Hey i am looking for a heavy duty 15 tooth clutch bell. My problem is i have a nitro mt and i am using a steel spur gear. I have meshed the gears right and used the paper test, but for some reason after about 10 tanks or so the clutch bell becomes stripped. Can anyone recommend a good clutch bell. I am now using a duratrax ultra light non full lenght teeth clutch bell made of harden steel, and it's looking pretty much like the rest.