I figured since alot of people have been asking about the upgraded clutch bell and spring i would make a post just about that.

Hpi 2 speed clutch bell for tornado xp and other 2 speeds

hpi #83069: http://www2.towerhobbies.com/cgi-bin...4&I=LXCLR2&P=K
hpi #76977: http://www2.towerhobbies.com/cgi-bin...4&I=LXDHM0&P=K
hpi #76982: http://www2.towerhobbies.com/cgi-bin...4&I=LXCLR9&P=K

Hpi single speed clutch bell for volcano stx and other single speeds

hpi #77107: http://www.clermontmotorsports.com/s.../Detail?no=200 this is the vented racing clutch bell with bearings at a great price or http://www2.towerhobbies.com/cgi-bin...?&I=LXLST9&P=7 (you can use more or less teeth, less teeth better acceleration, more teeth has more top end and faster)

clutch springs

traxxas #4146: http://www2.towerhobbies.com/cgi-bin...46&FVPROFIL=++ (regular)
traxxas #4146x: http://www2.towerhobbies.com/cgi-bin...=++&search3=Go (high stall, more rpm's before engaging the clutch)
Only use the springs with the traxxas setup the clutch shoes wont work

mpi #3072: http://www2.towerhobbies.com/cgi-bin...?&I=LXUR89&P=7
cheaper alternative

This setup from hpi will eliminate the spring all together:
hpi #A886: http://www2.towerhobbies.com/cgi-bin...?&I=LXVK12&P=7

Adjustable clutch shoes and spring
hpi #A885: http://www2.towerhobbies.com/cgi-bin...=++&search3=Go
volcano single speed spur gear: #8033

Hope this helps some of you's out, i have personally used the hpi cluch bells and the traxxas 4146x spring and i am very happy with them both, the cluch bells will eliminate your problems with stripping gears so i would suggest you do it.