RE: Prime Sport
I built the Prime Cut when the plans first came out and it was a good flyer. I only flew it about a month before it was lost in a shootdown.
I have been flying the Choice Cut for many years. Really wild tumbles are what it does best. Compared to the newer lightweight designs it's like a flying truck but I can just manage a hover with my old Q52 on a good day. I think I made the rudder a little larger and modified the elevators to get max rudder throw and with the side area of the Choice Cut it will knife edge all day. The prime Sport should be close in flying characteristics.
The plane in my avitar is the Choice Cut.