I recall they said to put the clutch shoes in opposite so it pushes the bell instead of drags it, and to use aluminum shoes and a very light or no spring.
If that's what they're recommending, they should not sell those stockers with the kit then .
Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)