I'm trying to shim SHS 32:1 in my G&G M14 gearbox am I'm having a bit of trouble. I've spent 2 days on it so far and still can't get it shimmed correctly. I polished some parts of the gears. Not sure if that's bad for them or not. 008 by Brandon1chang, on Flickr I'm not sure if they are supposed to look like that or not but I feel like the teeths on the spur and sector are too far apart. And when I spin it fast, it sounds weird. See here: http://flic.kr/p/dnBPKQ I've made sure none of the gears are touching each other or on the sides of the gearbox. Any suggestions or did I get a bad set of gears?