I figured I'd just give my 2 cents on my Reedy motor. I have the M3 17.5 1s with the 272 rotor and I run a 69 spur with 28 or 29. I get great pull down the straights and out of the corners. The 1s is meant to run a higher rpm than the normal 17.5. I don't set the timing by degs, I use the amps and sound of the rpm range. My current track has about 150ft straight and doubles just around corners. Once you find what the motor likes, it's badass.