First with apologies to the OP for continuing off topic - I have the OS controller, with a Hacker A60-5S (28 pole) on 8S (Mythos 125) I had slight loss of Sync at the Hacker recommended timing of 25 degrees which was cured by adjusting the timing to 22 degrees. Recently replaced the 5S motor with the A60-7XS (also 28 pole) - saving a whopping 140g & therefore allowing me to put the CG further back, anyway the loss of sync issue could not be fixed by timing - tried down to 10 degrees but was still terrible - solution has been a CC ICE 100 that I already had - and even that required some tinkering. Tried the latest firmware (4.19) that was supposed to be for high pole motors - didn't work, power cuts significantly at 60% throttle so went back to V3.27 with low timing, 12KHz PWM rate and all good
Steve