RcRicer

Ok guys. On my Fw05 S I did not get any motor mounts. They don't have any from what I see in the manual. So I can't order them. Today I just got my car back from the shop and almost stripped a second gear in less that and hour from getting it from the shop. I found the problem. Then engine keeps moving so the gears continue to strip. What can I do to stop this. Do I just thread lock the screw so the engine won't move? I screwed it as tight as possible but it still moves.

p.s(I tried screwing the screw tighter and now I can't get it off because the head is stripped how can I remove this?)