I don't have any now.... b/c I don't have a crawler...but I'm gathering as much info as possible so that when I get everything I need to build, the building will be easy b/c I'll already know all of the tricks...btw this wouldn't ba a traditional crawler, probably one hooked up on a 20 turn motor or so, then just geared really low, that way I can have speed, and torque...it would be just for running around my grandma's house, no serious competitions...and I like the way he articulation looks, so that's what I'm going for...