Originally Posted by Brian McGreevy
Try taking out the rear-most motor mount screw (that attaches to the left rear bulkhead). I haven't gone and measured why, but for some reason, that eliminates the tweak.
I've had some luck assembling everything but leaving the screws loose. I tighten the L shaped part first to the chassis then I tighten the spur/layshaft mid-bulkhead to the chassis. I next tighten the rear most motor mount screw that attaches it to the mid-bulkhead and then tighten the motor mount/L shaped piece screw. I then finally tighten the final screw that goes from motor mount to mid-bulkhead. Basically tighten everything to the chassis first, and then tighten the motor mount to the mid-bulkheads. I've also heard of guys shimming under the L shaped piece to get rid of some tweak, but there is a bit of slop in the whole assembly that can help out if the screws are tightened in the right order.
Brian, I was up at FSAE this weekend too! I heard from my buddy Kevin that you were up there. We were both on the NIU team and drove up together to get back in the action. Small world!