During March 2025, Diaz focused on maintaining and optimizing device support for the immortalwrt repository, specifically addressing sysupgrade compatibility for legacy TP-Link RE450 v1/v2 and RE355 v1 devices. Diaz applied embedded systems and firmware development expertise, using C to enable tiny-image builds within the ath79 target, ensuring firmware images fit constrained flash sizes without removing essential features. This targeted bug fix allowed users to securely upgrade aging hardware, extending device lifespan and maintaining a reliable upgrade experience. The work demonstrated depth in device configuration and a careful approach to balancing feature retention with hardware limitations in open-source firmware maintenance.