I was breaking in my new hpi .15 yesterday, the screws that control the mesh got a little loose and the engine moved back alot, i screwed in the screws really tight, but the thing is i forgot to move the engine forwards before i tightend it, I tried to lossen up the screws, they all loosend but one, it got stripped, so i cant finish breaking in my new engine, i was only on the third tank, The engine wont move back at all its not even close to tuching the spur, any body else have this prob, How can i fix it, any help will be apperciated.