wheels need to be balanced perfectly?

[EricH]

Depends on how you're off by those few thousandths. If the axle is too thick, not much (besides the fact of tolerances).

If it's out of round or the hole is off, that's a little worse, but not a lot.

I'd like you to meet a machinist's best friend: tolerances. A few thousandths could easily be within tolerance and have almost no effect.

A few thousandths isn't much to worry about. A few tens of thousandths would be.

[MrForbes]

isn't the FRP sheeting sitting on carpet? so it will deform some with the weight of the robot on it, and the wheels will mostly all make contact (although a drop center wheel 6WD robot will always have more weight on the center wheels).

If you design the robot so the chassis can twist, like the kit frame will, then it may not be an issue because of that.

[david cobbley]

thats what i figured plus the surfaces of the wheels and floor arent going to be perfect, the regolith is bumpy anyways... thanks