I have not tried the Suppo motors yet, but I do have an ARC 28-37. It is a GREAT motor, in my opinion these are one of the best kept secrets in e-rc. Dave @ Lightflight is one of the good guys, and I would not hesitate to give the Suppo motor a try if it fits your application. I've been eyeing up the smaller Suppos, but I am trying to trim the fleet, not expand it![:'(]