Hi Don , I had a singing canary, same situation as you , tried springs which worked for a while then the birds returned . Got used to it in the end . Turned out to be the dimple stopping the RELEASE BEARING CARRIER from spinning had been flattened by the previous owner . Sorted by drilling and adding a split pin to the carrier to stop the spinning . Discovered with a recent gearbox overhaul and clutch change with Pete in control . Vitesse mk1 gearbox
Paul