Not sure why the coil is moving, never had that problem, bolt that way up should be no problem. I assume you are setting the coil on the steel section of the flywheel, and 30 thou is a bit too wide, coil should not move if nothing is hitting it. Only other reason is it isn't tightened up properly, doesn't need too much just enough to hold it in position. Fix that problem, fit the blade carrier and then worry about the misfire. Out of curosity, was this motor running before you stripped it down?
