This is just a quick mock-up. I haven't bashed anything just yet... but as soon as I got my Crossovers Captain America home, this is one of the first things to occur to me. The head is from Crossovers Thor... I used a silver marker to paint his yellow "hair" silver. The red bits are just parts of a dollar toy plastic truck that I cut up quickly to test my theory. To do it properly, you'd probably want to cut out the bottom of Cap's front end and inset a proper red chest/head area. The rest is stock... no alterations. Painting wise, this is almost already in final colours! I'd just paint some blue on the rear end of the truck so it's only the rear cap/shins that are red, not the entire legs. Also, I'd probably sand off the star emblem on the front hood. There we have it... an ALT-sized Gears! The humvee mode would be a bit off-scale next to other alts, but the robot mode is practically exactly the right size.