hp 727/732 printhead priming for t2600

[LoneStar 001]

so this saga with our t2600 continues. I managed to acquire an HDD with older firmware which in turn allowed the machine to boot. Scanning works and the only outstandnig issue appears to be the printhead. The machine keeps b***ing about needing a new print head. I have old new stock but I suspect the printheads are a bit on the dry side being we are so high in elevation (8K above sea level). Anyone recommend a manual priming tool for these newer printheads ? I have a manual primer tool for the older t7700 but not for a t2600. thx.