In reply to Dave Garnett: Dave, thanks for that. I've sent him an email. Further suggestions welcome.
Basically it's unusual stiffness in ring and middle fingers on both hands for the past 4-5 weeks for a few minutes after waking up, and a strange "clicking" in ring fingers as I extend from 90 deg to full, again for a few minutes after waking. It's not chronic but I want it sorted ASAP and cost is no issue!