So i put it together to se if it would run, and it did. There was a strange grinding so i took it apart again, reassembled it and there is no noise now. I only have a 7.4 lipo to test with (which may be too high) and now it sounds like the gearbox may be reversing . I honestly dont know because ive never heard reversing before, but it takes another half second to what seems to be winding backwards. This is with shs 13:1 gears and a leftover matrix 3000. Could it be bad gears?