I do this always by hand with a small fille inside.
On Vintage ones I reshaped the outside too.
But your way is nice and make it faster and easier to get good results.
Same on Josh's 1680
But there is a other problem on his 1680.
The diameter of the Glass is slightly larger than a Clark's one.
There is also a plastic gasket between Glass and Retaining Ring.
All in all a bad construction.
MBW is way better.
So this is a problem on the V3!
The Case s to much machined in the Crown area, so the Crown touched the Bezel.
This is why I think the V2 Case is much better.
I posted this problem time ago and decided to build my Hybrid Sub.