I started mine off with the new cg mod and since I have done nothing but add weight to the tail. Kris is right about his assesment so far. I like the rearward CG much better and I'm working with mixing to dial the plane into a true knife edge and vertical downline. I have had to work with the engine thrust twice and I have a slight problem with the tracking on loops. I wish that I had split elevators so I could correct that easier. The plane is a blast but it takes a little work to get it dialed in. One thing thats great about it is the power to weight ratio with the YS 63 up front. When I dial mine in I'll post the CG location. Sooo many planes and sooooo little time. Mike