Originally Posted by
steelbikeguy
I suppose the best source of info might be someone like Jim Merz or Mark Bulgier, since they have a deep history with the hobby and are skilled machinists too.
Ha, don't mention me in the same breath as Merz. As a machinist I'm a self-taught shade-tree tinkerer, nowhere near Merz-level skilz.
Has this thread mentioned Frank Spivey yet? He was an American who was heavily into drillium in the '60s-'70s. He made elaborate drilling jigs that were time-consuming to make but then they made drilling multiple parts identically pretty easy. Lots of pics here
Velo-Retro: Peter Johnson
and also here
https://bikeretrogrouch.blogspot.com...ium-style.html