Hi,
for your information, I'm also in the progress of making a narrowed beam out of an original.
I went to a machinist who is going to turn out the Original beam so I can fit the original bearings back in. I managed to free the bearing out of the cut off parts. When I get the beam back from the machinist, I will have to heath up the beam and put the original needlebearings back in.
If you are interested, I can post some pictures when I get my stuff back.
Greetz
Wim