Agreed, the single point cut will produce a better thread on that fine pitch and we rarely use a "die" for OD threads in a lathe. Just no reason for it.
I am still a little baffled why one would go through the hassle of fixing or making a puller when they cost 13 bucks!! I am a CNC shop owner and know the tooling and programming time alone would cost a few hundred just for the threading. Time is always worth something.
Now repairing the threads in the flywheel, if it is stripped, I would probably tack weld the puller on, get it off, and replace it. Still cheaper than trying to repair the threads. Reason is once the threads are gone, you must bore and thread to a new size which will not be the puller size.
B