Regarding the Retrospec offset studs, no, I didn't encounter any issues when I installed it on my Less Tall Jr. I used it with a vintage style stop tailpiece made by Pigtail. I've heard of some people having some difficulties with Retrospec studs because the spacing (i.e., the notch) is a little narrower than some of the stock Gibson (and aftermarket) tailpiece ears. But this can usually be solved by sanding or filing down the bottom of the ears a bit until they fit into the studs. It's better to have a tight tailpiece-stud fit, than a loose one. I hope I explained that well enough.
Hey there, my name is Nick, I saw on one of your threads that you used retrospec offest studs to sort out the intonation on your less tall junior. I'm planing to try and do the same thing on an USA les paul jnr, so i can use a more vintage correct tail piece. Did you run into any difficulties while attempting this? I'm just looking for a little info if you have a sec. Cheers