The flywheel in question is in fact aluminum, no steel hub. You implied that if he continued, catastrophic damage was imminent – “Keep hammering on the flywheel nut, and this will happen”. I believe that is an exaggeration of the risk. As a puller is not an option, I felt the need to respond. As you do appear to pay attention to complaints, I apologize if I have offended you.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.