Bill,
Welcome to the forum. I have arthritis in my hands also. One of the problems with arthritis is that the fingers do not flex so good anymore and it is more difficult to make a fist. 10 years ago when I was in my 50's I had zero pitch in my fingers but no inserts. Currently I use soft inserts but use 1/4 and 1/8 reverse on my middle and ring fingers to accommodate my fingers that are now arthritic.
There must be other problems that you aren't mentioning besides arthritis if you are using an eleven pound
ball and are contemplating using a
ball with a retractable handle.
Have you ever considered going back to a conventional grip? No, a conventional grip may not hook the
ball as much as a fingertip drilling would but it would allow you to go back to a heavier
ball and would take some of the strain off of your fingers. It would certainly beat using a
ball with a retractable handle.
With a conventional grip there are several options to aid in gripping the
ball such as putting in "EZ lifts" or hollowing out the finger holes for the tips of the fingers. Ace Mitchell cork strips work well in a conventional grip. If you really have problems gripping the
ball there is what is known as a "slot grip" where your middle, ring, and pinky fingers all go into one elongated hole.