Be very carefull when tightening the screws that go into the motor plate, as they can strip very easily on some kits. If you strip them use a centre punch and whack the plate around the stripped hole a couple of times to make the hole "smaller" so the screws bites again.
When you build the diff get hold of some associated silicone diff grease and some black grease. The diff grease goes on the larger balls and the black grease goes on the smaller balls.
Do not use power tools to assemble it as it will strip screws.
Get yourself a set of ball bearings and build the car with them. It will run a lot better and wear less. They can be had for around a tenner so nothing major.
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