Ok, cool sounds good I juts picked up a 17t at the hobby shop today.
I got the car all together today for it's first test run and ran into some problems.
-When I go to accelerate upon take off it seems that the car hesitates and slips a bit, while making a horrible "grinding" sound. I obviously thought that the slipper was too loose so I tightened it up, but this was to no avail. When the car is off the ground, with no resistance from the road, there is no noise and the car functions normally and seems like it's going to rip

.
-I removed the slipper assembly for the car to inspect it and found what I think could be the problem. First, it seems the main drive gear has melted a bit and the teeth have worn down, so I know it's not making a solid connection with the belt. The belt itself is in great shape though. What would cause the main drive gear to melt down? Perhaps the belt tension was too loose?
-Also, it seems the spur gear itself has some play from side to side, even when the slipper is tightened all the way. Is this normal? The slipper seems to be working otherwise and it tightens down nicely. I disassembled the slipper and it seems there was only one of the small spacers used when it was built. Could only having one spacer affect the tolerance that much that it would have that much play? Other then missing one spacer the slipper is assembled correctly.
I am going to order a new gear set tomorrow as I know this one is toast. Would having a worn down drive gear cause this horrible grinding noise I am experiencing?
Thanks a lot for any help and tips you can offer.