As always amazing work!
Regarding sounds; besides the preverbial thrusters/afterburner/jump drive will each engine posess its own sounds? For comparison: the smallest being a geo metro vs the largest engine upgrade being something in the supercar ferrari/mclaren/saleen style.
I've been watching this project for a while now and I'm curious as well. You guys kinda dropped off the map for the past few months...everything still going, or going well I should say?