The electonics board is a 1/2" thick peice of baltic birch that fits down snug in the bottom. This will prevent it from twisting.
We also bolt some thin plates onto the 80/20 between the omnis and center wheels to prevent the frame from being crushed in on the sides.
We've intentionally left these things out to make it more adjustable for the build season. The competition bot will be tougher.
As for the omnis we'll have to wait and see the game before we decide if smooth rolling is important (only have to wait 24 hours
). We have some double-wide Kornyak omnis if they are needed.
This is a very adjustable system. We can mount the wheels on one side for 2.5" of ground clearance (perfect for ramps), or on the other side for .5" of clearance (perfect for flat fields). We can also mount 6" wheels or even meccanums if we're so inclinded (need to build two more trannies in that case).