First of, sorry for the necro!
I'm curious to hear how you'll be fitting these into the Solar Auxilia setting, seeing as the army only has the Dracosan (and Arvus) for its transport duties. As for regular PDF duties, with some conversions it shouldn't look too out of place
IMHO.
Don't give up, keep at it!
Also, if looking for a unique PDF look, have you thought about replacing the tracks with wheels? That's what I've done with all of my own Taurox transports.