Since the HO Gang (myself included) seems to have a tendency to stray off topic, thought I'd start a thread devoted to wrenching on these tiny cars and maybe make things easier to find. They're a lot different than they were when I was first doing this shortly after electricity was invented. I'll start with a couple quick questions I have: 1) Pickup shoes. I see posts about shoe tuning or flattening shoes to get better conductivity. What are you looking for, just maximum contact patch? I assume you set the car on a piece of track and then just gently bend the shoes to maximize? After first making sure your guide pin isn't hitting the bottom of the slot of course; 2) Gear mesh. When I was breaking in motors I noticed I have a couple Mega G cars where the gears bind when the axle moves all the way out to passenger side of car. Both these cars pulled significantly more amps than the other two Mega G. I'm not sure how much axle play I should have in the rear so not sure of the best way to fix. Should I just press the spur/crown gear towards the left slightly and leave the play or should I actually shim the axle assembly so there's a little less play? Any rough measurement on how much side to side play I should have in rear axle? Thanks.