I had the exact same problem with a pair of NIB 1936 FB hubs. I bought another set, built one, have the other on display. Problem solved.

I like 'em on the shelf collecting dust. Got plenty of users.

No guilt, no problem.
If you have the luxury of holding some, hold 'em.
If you want to ride 'em, ride 'em.
We all do the same thing with bikes.
We ride the 1, store/show/hoard the N.

I wish I was just collecting parts.

You're only a virgin once, then after, the pleasure is for a lifetime