That's interesting. Robot Marketplace had been out of stock for the past year or so. Must have found another case of them somewhere.

Reverse can be disabled by programming on the Traxxas EVX speed control. Do a check of your programming to be sure you did not accidentally disable it. The esc being used by the Donzi in the above video is a Novak Super Duty. The Traxxas EVX is made by Novak, in case you didn't know.