Thanks guys that sounds like a good plan to rotate the use. My friend who does a lot of dressage uses spurs and says its like poking your horse in back. When I ride I ride with a lot of legs and prefer not to have much mouth contact, I can get some good circles on him only using leg pressure. I have a interest in natural horsemanship techniques, so have never used spurs, but I want to keep his abilities that his previous trainer has given him. It would be a shame for the sharpness to go.
I will give the rotation of use a go, or even do some arena work in some one a week.