i know of a team who is doing treads with a similar design
a few things to think about
1.) where will and where won't the tread be exposed
2.) tension, tension, tension
3.) it looks like you have nothing to keep the tread running in the middle of the track (i am assuming there will be a covering plate of some kind)...some kind of runner would dramatically help. somewhere about 1/16" (that's 1.5 ish milimeters if my math is correct) is ideal clearance between the runner (or side panel) and tread, not too tight, but not a lot of slop.
it looks really good though...maybe that other
team will have some pics up soon of their tread system.
gotta love extrusion!