Firstly Herb I've got to give you credit...
A lot of guys suffering from any sort of arthritis would just forget completely about exercise! Kudos for the dedication.

I really can't give you any credible advice as I've never dealt with any of those issues personally, but I'd certainly recommend pilates or yoga for a little additional flexibility ?
Andre Ward is one shining example of the benefits of such exercises.

I'll have a think for you, to see if I know anyone in a similar situation...