It will be interesting to hear how this works for you as most of the newer engines have the holes to improve the balance already drilled. If it ends up even smoother we will have learned more.
@gary55 I'm going to assume that the EU engines are like the ones Jaguar's advice is based on. I didn't want to go back and do this again after finishing my build so I took the leap of faith!
Certainly the pictures, problems and advice from the ancient sticky threads and other ancient threads started by Jaguar, Al Fisherman, etc. seem to relate to the engine I have here.
@FurryOnTheInside Cool nothing but good wishes here. I can imagine you are getting a bit excited now that your so close. With all the time and thought you have put into it it should be a really good bike.