Thanks for the replies. I also have a resin Aulos, I play with a thumb rest, I’m heartened no one suggested it’s my recorder, I can work on my position, and I can get a thumb rest, although I didn’t want to spoil the line of the wooden instrument, but if it was the recorder I’d be most upset. I also have RA but only my thumbs are showing any distortion as yet. Previously I played Northumberland small pipes and have had to give these up as I’m no longer capable of the speed and physical effort I need for them. Recorder is a fine instrument and I’m really enjoying it immensely, especially the huge range of music for it.