[MetalMan]

I think the acceleration will be dependent on how the ESC is programmed. If it's not fast enough, you could always decrease punch control on the MM, or do the equivalent on the Quark. If that's not enough, then a little adjustment to the exponential on your radio or to the throttle curve on the MM should fix any slow spool-up issues. I can tell you that the outrunner in my 2.2 rock crawler (the size of a 540 brushed motor) gets up to speed VERY fast, even when geared for 12mph and running a Mamba 25 on 3s Lipo.

This whole idea of outrunner-in-the-middle has intrigued me to try the same sort of setup in my MT2. The dual slipper clutch (torque control) idea is excellent, if it could be pulled off efficiently (not too heavy or takes up too much space). Thankfully outrunners are built such that custom shafts could be made, more specificially to fit into a custom slipper clutch setup.

Speaking of slipper clutch setup, we gotta get some sort of 3D model of one made using Revo components. The slipper clutch items would most likely need their own chassis-mounting hardware, so as not to put too much strain on the motor's bearings. I'll be thinking about it and maybe drawing one up.