WELL I went ahead and did what I thought might work and it has so far been sucessful. I drilled and tapped a 3mm thread into the clutch lever stop and inserted a 3mm countersunk screw which spaced the lever in a bit, [forgot to measure] but it is much better for my hand now. I then removed the pushrod and cut 3 mm off the end, enough to give it some free play and refitted it. Haven't quite managed to get the sealing boot over it yet. This has given me much better control over the clutch specially at low speeds. A sucessful modification.
Sailor Sid