U Can Do 3D
John,
I got lucky in that the spring only broke off at about 1 turn from the bottom. I have always run it below 9k RPM, so it is probably just one of those things. I think that this just caused the intake valve to float at much lower RPM. Parts are on order, so hopefully I will be back in the air this weekend (if the weather is cooperative). I really want to wring this plane out after all the stuff in this thread.
Dale