Re: pic: 57's frame is coming along
 

I would be careful using the plastic clamping bearing blocks we broke a few on the ri3d chassis going over the obstacles with speed.

Re: pic: 57's frame is coming along
 

Ours as well....I had to take a second look. Realized that the idler wheels in the middle were different.

Re: pic: 57's frame is coming along
 

Cooper, that is a fascinating insight. Like I said, this isn't our actual chassis. We're using the aluminum VersaBlocks for the outside wheels on our chassis, but we're using a plastic bearing block for the middle wheel to get the 96 tooth spacing from two simple clamping gearboxes. I'll definitely have the students abuse the chassis a bit to see if we need to do something about the plastic block for the middle wheel. If it's too fragile, I'll have to mill down a versablock to get the same spacing.

Re: pic: 57's frame is coming along
 

I think the block would be fine if it didn't take so much load from wheels being cantilevered. We had the issue on the outer wheels of a wcd and not so much the middle wheel because at that point the middle wheel was in the air, or didn't hit the defense/obstacle first/last.