On Sunday, August 23, 2020 at 9:22:35 PM UTC+1, Dee wrote:
Good lead, JJ, I see the boot in the drawing and will next remove the rudder for further inspection.
Thanks
I had the same problem in a Discus 2b - it was the rubber boot. You have to remove the rudder for access, but it's not a big job for someone experienced with this airframe.

Mike