It is also surprising what a difference the steering wheel size makes when in comes to ingress and egress, I replaced it with a 14" Moto-Lita wheel and was amazed at what a difference it made to get almost 2 more inches of leg clearance. Some would argue that it is harder to steer, as you lose some leverage. I say it helps keep my arms in good condition.
Spot on Edwin
Wishing Alastair a speedy post-op recovery, by which time I should have concluded my quick release steering wheel project.