Thanks for the ideas.
That is what I had thought, that the RR hole must not be centered, but that spring is awful wide looking. I will compare it with some other locks.
I would think that the DursEgg lock should work with a straight 7/8" barrel.
A good thing I did not mention is that the inside RR channel is routered and not just drilled, so I can easily access it there, as well as check how of centered it might be. I had not noticed it being off centered before, but it might be?
Thanks again