Tom, I really appreciate this video. Seems so simple & I'm kicking myself for not figuring it out on my own, having fought the replacement process numerous times in the old Mokai & new. The little tool from the factory is totally worthless, so would carefully do similar as shown on your video only with out heat using a sharp chisel, but couldn't help leaving some slight gouges that then would have to be sanded smooth. Now having already purchased your aluminum ring, but with winter here in Wyoming since, I haven't put it in, so now that job will be a breeze.
Jay