Well just got a mamba 6900 combo 4 my t4 and i ran it today and all good i folowed the instructions on linking the esc to the transmitor and all gold. but now i have done some tuning on the comp and it sais after you have tuned via castle link software you must calibrate again which is.
1. Turn on radio, and plug in battery with switch on esc off
2. Hold full throttle and turn on esc
3. Now it will make lots of noises ect.

It will accept full throtle postion but it wont acept full break/revers postion it just flasehes red waiting for full reveerse/brake.

I also updated the firmwire aswell to the newest one out

However when i dont attempt to calibrate are pluggin it in it works with forward and the reverse lock out.
cheers,
alex