Hmm...I think I'm having the same problems, tried all sorts to calibrate my MMM to my KO Propo Helios EX-10 that has a Spektrum module in it. Regardless of EPA values of 90-150 on throttle and brake and normal or reverse on the throttle channel, it's not having it!!

Should I roll back to v1.21, or is there a fix for this now?