MM hesitates/stammers on slow take off. Where should I start

with the software update , i still had some problems, although i think mine was caused by gearing, i spent the better part of an afternoon and got it to start ok in my truggy, but a smaller pinion would have helped

i would suggest tring diff. settings on the mm and see if it helps, its a pain , but with your gearing it shouldnt be all that bad, try diff. timing and start powers