i dont know what the fuck hes talking about up there or how his shit got too tight and melted, that is some serious user error there.
these internal ignition coils are the bees knees. there a couple of things you should do before installing one though. First, get a bosch condenser when you order it and replace the condenser thats in it. you dont HAVE to, but the condensers that come with these have about a 40% failure rate. maybe youll get lucky and the coin flips in your favor but better be safe than sorry
second, and this is a new thing ive started to notice. the points on these have a tendency to float at high rpm if you dont REALLY tighten down the screw. so before installing, take the points screw out, put some red loctite threadlocker on itthen put the screw about 3/4 of the way in. put your flywheel on, then set the points and REALLY crank down that screw. let the threadlocker cure, then start it up.
take these steps and this stator will provide you with insane spark for a good long time. plus you get the benefit of 12v lights. you can power everything on a stock wiring harness with this without having to change anything either, because it isnt a super high wattage coil, unlike the treats cdi (80+watts!!!)
if its making the flywheel tight, or melting or whatever you have done something terribly, terribly wrong.