I've been through the washer scenario before and keep washers on hand now
The 13T I got with my new CMS direct drive setup required less washers than my HPI 17T racing clutch bell.
Anyway, I replaced the stock aluminum clutch shoes and spring scenario with an HPI Teflon Clutch Shoe Set - http://www2.towerhobbies.com/cgi-bin...86&FVPROFIL=++
It completely eliminates the use of a spring and I have absolutely loved it since the day I put it on!!! I went through 4 clutch springs before this, like once a week or so, and with these I've run it more than ever and haven't had a single problem since!!! The teflon shoes are barely wearing and wearing super evenly, although I will say the teflon is a bit more messy as it breaks in (little black dust spots on the chassis) but subsides once they are broken in.