I never use tools like that, even on old bikes.
As for OLD tools.... I ended up with an uncle's double open end wrench, made near a hundred years ago. It was 5/8+ and 3/4.
I needed a 17mm and 7/8 for the BB adapters. So I got out the files and grinder disc. A few hours later, voila. LOL Perfect fit.
Then I thinned it down because it was really clunky.
Plus a few years ago I finally used some stone dremel bits bought around 1965. LOL
I also resized one end on 2 other flat headset tools.
Last edited by GamblerGORD53; 02-19-20 at 11:07 PM.