np, Faststar.
Fly To Chill, I assume it's a press on, that there isn't a set screw near the base? If so, there are a lot of ways to get them off. I just cut to the chase and got a GWS pinion puller (example:
http://www3.towerhobbies.com/cgi-bin...&I=LXHHN3&P=ML) since it pops them off without a lot of fuss. Putting them back on, I used a bench vise- put the motor in the jaws, the pinion aganst the end of the shaft, then line everything up exactly while you slowly turn the vise down against it. Then it's a matter of just turning the vise in until the pinion is in the right position. Others have used C-clamps, and so on.
Better IMO is to get a decent pinion with a grub screw so you don't have to deal with the press on stuff any more. A little grean loctite on the shaft can lock it in place in addition to the screw, but I never bothered. I used these steel pinions, but they take a while to get to the US:
http://www.heli-fever.com/product_in...roducts_id=691. There are also Align and Revco options, but they're a little more difficult to fit.