Item 3 of the Schedule 13D is hereby amended and supplemented as follows: Additional Advance Under Convertible Note. On December 9, 2024, Kaufman Kapital made an additional loan to the Issuer under the Convertible Note in the amount of $1,400,000, bringing the total principal outstanding under the Convertible Note to $3,400,000. This transaction was reported in Amendment No. 1. Warrant Exercise. On June 5, 2025, Kaufman Kapital exercised in full a warrant (the "$1.00 Warrant") to purchase 1,000,000 shares of Common Stock at an exercise price of $1.00 per share, for an aggregate cash payment to the Issuer of $1,000,000. The source of funds for the warrant exercise was working capital of Kaufman Kapital, derived from the personal funds of Kaufman. Convertible Note Conversion. On January 28, 2026, Kaufman Kapital converted $500,000 of outstanding principal under the 12% Senior Secured Convertible Promissory Note (the "Convertible Note") into 659,457 shares of Common Stock at the fixed conversion price of $0.7582 per share. No cash consideration was paid or received in connection with the conversion. Following the conversion, $2,900,000 of principal remains outstanding under the Convertible Note. New Senior Secured Promissory Note. On January 28, 2026, Kaufman Kapital loaned $1,500,000 to the Issuer pursuant to a Senior Secured Promissory Note in the principal amount of $1,500,000 (the "New Secured Note"). The New Secured Note bears interest at a rate of 8% per annum and matures on January 28, 2027. The New Secured Note is not convertible into Common Stock. The Issuer's obligations under the New Secured Note are secured by a lien on substantially all of the Issuer's assets pursuant to the Security Agreement (as defined in the Original 13D). The source of funds for the $1,500,000 loan was working capital of Kaufman Kapital, derived from the personal funds of Kaufman. Repayment of Prior Secured Note. The Senior Secured Promissory Note in the original principal amount of $1,200,000 (as increased by a $300,000 additional advance), issued to Kaufman Kapital on August 29, 2024 (the "Prior Secured Note"), has been repaid in full by the Issuer during the year ended December 31, 2025.

Item 4 of the Schedule 13D is hereby amended and restated in its entirety, and supersedes and replaces in its entirety the Item 4 disclosure in the Original 13D and Amendment No. 1, as follows: June 2025 Warrant Exercise and Amendment. On June 1, 2025, Kaufman Kapital and the Issuer entered into a Warrant Exercise and Amendment to Notes and Warrant Agreement (the "June 2025 Amendment"), pursuant to which: (i) Kaufman Kapital agreed to exercise the $1.00 Warrant in full for $1,000,000 cash, (ii) the expiration date of the warrant to purchase 500,000 shares of Common Stock at $1.50 per share (the "$1.50 Warrant") was extended from December 31, 2025 to December 31, 2026, (iii) the maturity date of the Convertible Note was extended from December 31, 2025 to December 31, 2026, (iv) the maturity date of the Prior Secured Note was extended to December 31, 2025, and (v) the Issuer agreed not to prepay more than $2,400,000 of principal outstanding under the Convertible Note prior to September 30, 2026 and not to make any prepayment under the Convertible Note while amounts remain outstanding under any non-convertible notes of the Issuer (excluding notes issued pursuant to equipment financing). A copy of the June 2025 Amendment was filed as Exhibit 10.1 to the Issuer's Current Report on Form 8-K filed on June 2, 2025 and is incorporated herein by reference. January 2026 Conversion. On January 28, 2026, Kaufman Kapital converted $500,000 of outstanding principal under the Convertible Note into 659,457 shares of Common Stock at the fixed conversion price of $0.7582 per share. January 2026 New Loan. On January 28, 2026, Kaufman Kapital loaned $1,500,000 to the Issuer pursuant to the New Secured Note. Current Plans and Purposes. The Reporting Persons currently hold the securities of the Issuer for investment purposes. The Reporting Persons continuously evaluate their investment in the Issuer based on a variety of factors, including the Issuer's financial condition, results of operations, business prospects, general market and economic conditions, and other factors. Depending on such evaluation, the Reporting Persons may from time to time acquire additional securities of the Issuer (including through conversion of outstanding Convertible Note principal and accrued interest or exercise of the $1.50 Warrant), dispose of some or all of the securities of the Issuer (including through open-market sales, privately negotiated transactions, block trades, registered offerings, or otherwise), or take any other action with respect to their investment in the Issuer as they may deem appropriate. Any such transactions may be effected at any time and from time to time, without prior notice, and will depend upon a variety of factors, including those described above. Except as otherwise described in this Amendment, the Reporting Persons do not have any present plans or proposals that relate to or would result in any of the matters described in subparagraphs (a) through (j) of Item 4 of Schedule 13D.

Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows: (a)-(b) As of the date of this Amendment, the Reporting Persons may be deemed to beneficially own an aggregate of 6,813,306 shares of Common Stock, consisting of:

(i) 1,659,457 shares of Common Stock held directly by Kaufman Kapital, consisting of 1,000,000 shares acquired upon exercise of the $1.00 Warrant on June 5, 2025, and 659,457 shares acquired upon conversion of $500,000 of Convertible Note principal on January 28, 2026; (ii) 3,824,848 shares of Common Stock issuable upon conversion of $2,900,000 of outstanding principal under the Convertible Note at the fixed conversion price of $0.7582 per share; (iii) 829,001 shares of Common Stock issuable upon conversion of approximately $628,600 of accrued and unpaid interest under the Convertible Note as of the date hereof, at the fixed conversion price of $0.7582 per share (interest continues to accrue at the rate of 12% per annum on $2,900,000 of outstanding principal); and (iv) 500,000 shares of Common Stock issuable upon exercise of the $1.50 Warrant at $1.50 per share. The percentage of Common Stock beneficially owned is calculated in accordance with Rule 13d-3 under the Exchange Act based upon a denominator that includes (i) 14,582,416 shares of Common Stock outstanding as of March 25, 2026, as reported in the Issuer's Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the SEC on March 31, 2026, and (ii) an aggregate of 5,153,849 shares issuable upon conversion and exercise of derivative securities held by the Reporting Persons that are convertible or exercisable within 60 days, for a total denominator of 19,736,265 shares. Kaufman, as the sole member and manager of Kaufman Kapital, has sole voting and dispositive power over all securities held by Kaufman Kapital. Kaufman does not directly own any shares of Common Stock.

No transactions in the Common Stock were effected by the Reporting Persons during the past 60 days.

No person other than the Reporting Persons is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities covered by this statement.

Not applicable.

Item 6 of the Schedule 13D is hereby amended and supplemented as follows: In addition to the agreements previously disclosed in the Schedule 13D, the Reporting Persons are parties to the following agreements: Warrant Exercise and Amendment to Notes and Warrant Agreement, dated June 1, 2025, between Kaufman Kapital and the Issuer, pursuant to which, among other things, Kaufman Kapital exercised the $1.00 Warrant in full, the expiration date of the $1.50 Warrant was extended to December 31, 2026, the maturity date of the Convertible Note was extended to December 31, 2026, the maturity date of the Prior Secured Note was extended to December 31, 2025, and the Issuer agreed to certain restrictions on prepayment of the Convertible Note. A copy of this agreement was filed as Exhibit 10.1 to the Issuer's Current Report on Form 8-K filed on June 2, 2025. Senior Secured Promissory Note, dated January 28, 2026, in the principal amount of $1,500,000, issued by the Issuer to Kaufman Kapital. The New Secured Note bears interest at 8% per annum, matures on January 28, 2027, and is secured by a lien on substantially all of the Issuer's assets pursuant to the Security Agreement. The New Secured Note is not convertible into Common Stock. A copy of the New Secured Note was filed as Exhibit 10.1 to the Issuer's Current Report on Form 8-K filed on January 28, 2026. The Convertible Note, as amended, continues to be outstanding with a remaining principal balance of $2,900,000 and approximately $628,600 of accrued and unpaid interest as of the date hereof. The Convertible Note bears interest at 12% per annum, matures on December 31, 2026, and is convertible at any time at the option of the holder at a fixed conversion price of $0.7582 per share. Both outstanding principal and accrued interest are convertible into Common Stock. The Issuer's obligations under the Convertible Note continue to be secured by a lien on substantially all of the Issuer's assets pursuant to the Security Agreement. The $1.50 Warrant remains outstanding and is exercisable for 500,000 shares of Common Stock at $1.50 per share through December 31, 2026. The Prior Secured Note has been repaid in full and is no longer outstanding. Except as described above and in the documents previously filed with the Schedule 13D, the Reporting Persons do not have any contracts, arrangements, understandings or relationships (legal or otherwise) with any person with respect to the securities of the Issuer.

The following documents are incorporated by reference as exhibits to this Amendment: Exhibit A: Joint Filing Agreement between Daniel L. Kaufman and Kaufman Kapital LLC (previously filed with the Original 13D) Exhibit B: Warrant Exercise and Amendment to Notes and Warrant Agreement, dated June 1, 2025 (incorporated by reference to Exhibit 10.1 to the Issuer's Current Report on Form 8-K filed on June 2, 2025) Exhibit C: Senior Secured Promissory Note, dated January 28, 2026, in the principal amount of $1,500,000 (incorporated by reference to Exhibit 10.1 to the Issuer's Current Report on Form 8-K filed on January 28, 2026)