I have used Fullbore and Group K. I used to use Group K back in the day and just sent my 787 cylinders to them and they looked to be finished better than fullbore. Harry at Group K is very well know for his endurance racing skis so he knows how to make them last over being the fastest. Check out his website and be prepared for a lot of good technical racing. The other thing is they always answer the phone and are willing to talk as long as you want.
