Originally Posted by JRRobiso
The std kit (non-ms) has the stardard arms & 3.0mm bottom plate. The ms version has the light weight rev arms (EVO4), 2.5mm bottom plate, re-designed f/r shock towers, re-designed motor heatsink & spur gear backing plate.
To view the difference of the two kits, click on the ff links :
TRF415
TRF415MS
Hope this helps.
Additional note when you click on the TRF415 link, the pictures you see there are the prototype ones. The released version didn't not come w/ the spur gear backing plate & for the MS version it also came with white low friction belts, belt tensioner & TRF blue damper set.