[CRUSH-build] spacers for wheel sprockets

[Bill Bennett]

Chassis/Drive train team:

The wheel sprockets get bolted to the wheels spaced out whatever distance is 
required to make the chains straight. I neglected to order any spacer 
assortments for this purpose, so we'll have to find them locally. The parts 
IFI sells are nylon with 1/2" OD and 0.194 through hole and come in lengths 
of 1/8", 1/4", 3/8" and 1/2". Also I don't believe any screws for mounting 
the sprockets are provided in the wheel kit, so we need to spec them and buy 
locally. Six screws and nuts are needed per wheel, and probably the right 
size is 10/32 - it's what we've used in the past for the same sprocket hole 
pattern.

Also please be sure to use lock-tite when doing final wheel assembly. Get 
guidance from your mentors about this. There are many screws in these wheels 
and we don't want wheel them vibrating loose.

Bill