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well first this thread is about securing the wheel back onto the axle i believe. which you just take the wheel off clean the grooves in the axle and put a litle jb in the wheel hole and put the axle in.
then theres my axle holder mod where you pretty much lay the car upside down. put a piece of cardboard or tape between the gear and the chassis and drip some jb into the slot and cover pretty good. remember to turn the axle every hour or two until it is almost dry. then put the car on the charger and run it under no load for 20mins or longer. it takes a few days to break in but once it does you will have an axle with very tight tolerance ie.. no slop. after a week or so it will become very very smooth and quiet. my camera is in the shop so i wont be able to take a pic for at least a few days.
its fairly easy to remove this in case you need to replace gears or something. youd have to reglue it again tho.
your question about the motor terminals: it is non conductive so if it does touch the terminals it doesnt matter.
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