Tell the Doc that you want a new shoulder joint with a grease fitting in it. That way when it starts to squeak and hurt, you just give it a shot of grease.
As I am writing This as the snow flacks is going up So bear with me.
At 7:30 am I went under the knife for a scope of my right shoulder.The doctor found out why I was in so much pain from my shoulder replacement last year.The plastic ball that is moulded to the titanium has came loose and just floating there.The next step is to go back in two weeks and have this replace.The doctor and I are so blessed that we know what the problem is and I can get under way of being pain free again.Thanks you God.
Should have gotten one of the boat guys make you a good shoulder joint with their CNC machine. Some good stainless and some quality Delrin and presto! Andy?