Not sure if my control board is bad or what, but after completing the build of Nybble today, we calibrated it, got it up and running and were playing with the remote buttons. Everything worked perfectly. But after about 20min of playing, it lost stability and started rolling over. I turned it off to investigate the problem and found the servo on joint 13 (front right paw) to be extremely hot and seized up. I found a similar servo in my parts bin and installed it. It worked for a few minutes and then the same problems began occurring. Any ideas? What can I check on the board? Thanks