[mavrick0]

I did reply to your build thread but will reply here as well now that I know what ESC it is. First question would be did you calibrate the ESC to the radio. Second is did you ever have reverse at all. It might a couple of things. One the ESC isn't calibrated to the radio yet, two the ESC is in race mode which doesn't allow for reverse and third is I believe this should have a brake function the first time you put it into reverse then when you go back to neutral and reverse again you then get reverse.