So the solution is to replace ASC 91005? I could see how if you got a lot of lash in those bushings it would change the mesh on the countergear and bust it, which might explain that issue...

I despise racing indoor for this exact reason. Sooner or later, everyone there starts acting like BF Skinner's rats, in some perverse real life behavioral experiment. Not the scene you are looking for if you are racing to relax.