Originally Posted by TRF415boy

Well only if you're using the LW suspension that comes with the MS and MSX. In that case you indeed need to use HPI front hubs, with a 0.5mm shim on top of it, and either the pro4 driveshafts or use the wheel axles from the standard 415 suspension with 0.7mm of shims between the hub and the hex. Of course you'll need 4 5x10x4 bearings.