Fair points bro. I'll give your method a try next time.
Some other considerations for DIY'ers:
The aftermarket hytrel ring can just be cut instead of stretched. This takes out any guesswork in stretching and keeps the ring diameter uniform throughout its length. As you've seen the ring does not need to be intact.
You can use fishline in lieu of an aftermarket gasket. A whole spool is only a few bucks. I've fixed 7-8 bezels with fishline alone. Sizes I've used are 0.56mm, 0.61 and 0.64
However, using fishline carries a risk and it's happened to me once. If you choose a line thickness that is too big the bezel can still press on but then won't rotate and worse you can't get it back off. The only solution then is remove the movement and all gaskets and O rings possible and heat it in the oven at 500° or above for about 20 minutes. The nylon will shrink and become brittle (doesn't make a mess) but you will lose the crystal gasket too. The way to avoid this is start small and work up slowly.
But if using your electrical tape method, you can stay smaller with the fishline. Buy some the same diameter as the original hytrel ring. The more malleable tape (with some give to it) along with a smaller fishline should all but eliminate the scenario descibed above.