I ran a ISIS wheel in my old Yuni frame with stamped bearing holders for over 2 years with no issues whatsoever, In fact they fit better than 40mm bearings…
Also the google search seems broken, but the search in the drop-down box appears to be working.
The search function has been broken on this website for a while. What you can do is just include unicyclist.com among the words you search for on Google. That will get you pretty similar results to the old search bar, I think.
I have a similar experiance as Eric P. I ran 42mm bearings in stamped holders for years.
Currently i have a Qu-Ax 36 frame with stamped holders, and a cotterless 40mm hub. I didn’t like the fit, so I’m running it with shims to 42mm. Much better.