Replacement V3 arrived

I am so frustrated with this thing, it will absolutely not sync with my transmitter, at first I just plugged it in since it was replacing a MM I figure the settings should be all good, finds full throttle and finds brake (some times, most of the time it Green with random red flashes) So I've reprogrammed the MMM with cut-off on, off increased arming time, pretty much everything. Started from scratch with the Tx still no sync!!
If I let go of the throttle it finishes starting up but is cogging something horrible. Think I'm about ready to give up on this thing!

The thing that is really frustrating me is that it should be a direct replacement for the MM, could the settings be that different??

EMaxx
Medusa 36-60-2000
4S2P A123
4S1P 8000Mah 25C lipo
Futaba 3PM