The H9 Aresti is a lovely sport pattern plane. The plane will be nose heavy if you run a SA72, I had that set up. Also,the fuse has not much space for you to push the battery back. You will need about 2 oz on the tail to get it right. I believe a review with a 52 2C also found her to be nose heavy. What engine are you going to use? I find the RC Groups guy had some major problem, also his first posting is not very clear, how can it the plane be flown with that much deflection?