Hi Ralph. Mine passed too, in April at around 11k. Interestingly (and sadly) I too suffer from arthritis - mainly the left hand. It flared up after a RoSPA four day 1000 miles blast in Wales. I was also getting horrible cramps occasionally in my left hand. The joys of getting older! To ease the situation I regularly repeat the mantra "Bars like a budgie, tank like a tiger". In other words, grip the bars very lightly but keep locked on to the tank. This certainly helps. A hydraulic clutch would help too.
What bike would you get next, or are you hanging up your gloves for good?