by Reverend Tapit's the base issue that caused the injuries (weak muscles/loose tendons in the RC), and that is still an issue, that I'm looking to remedy.
Although you might not like what I am going to say, I think that gymnasitic with equipments is too strong activity. Yes, it will help to build strong arms and shoulders. That is gorilla like shape and strength. The activity even at intermediate level requires such physiques. That is why I say it is too strong. It will likely cause muscle overuse injury even without those dangerous moves like overhead somersault in mid-air. Another reason for likely cause of injury is the technicality of gymnastic with equipments. For example, moving on beams with the hands is placing too much stress on the arms and shoulders.
Shoulder joint is the most easily dislocated joint in human body. Once a joint has been dislocated, it will happen easier again because the soft bones, soft tissues around the joint (include ligaments ) are weakened. The only suggestion I will give you is to strengthen your RC first. No need to do exotic exercises. Simple exercises like internal and external upper arm rotation, forward and backward upper arm rotation against resistance will do. Go back to gymnaism only after you are certain you are ready.At this point, I have no range of motion problems, no pain, nothing like that; my shoulders are just far too willing to (painlessly) pop in and out of joint if I have my arms over my head.
One last advice is - if you will not give up gymnaistic with equipments, stay away from the dangerous exercises like horse stable, hanging rings, etc.
Regards,
KC
Hong Kong