@dmk I don't have any advice on this really, as my right shoulder issue is a full thickness tear of a rotator cuff. Needs surgery but have been able to manage it for nearly three years without. The left shoulder has issues that have yet to be figured out. Most likely from nerve issues coming from my neck that the ACDF C4-C6 did not fixed. Won't bore you with all that I have been and am currently doing for it. Since I haven't had any shoulder surgeries and when I do it won't be a reverse total shoulder, I don't really have any advice to give. What I can say is good luck and I hope you get the answers and relief that you need!