RE: Matt Chapman cap 580 .40 size
I had the Phoenix Models Giles 202 .46 that came in at just under 7 pounds and it was disappointing with a Saito .82 on the nose. That was without even attempting 3D since that plane doesn't have the control surfaces for it. Unfortunately, I have to agree the new Cap sounds a bit on the portly side. Caps also have a reputation for being snappy if you don't keep the speed up so I don't see much hope of getting any 3D performance out of this plane.
The Giles did fly like it was on rails and was OK for non-3D maneuvers. Just a bit too heavy for my tastes. I'm guessing this new Cap will be very similar. Too bad since it is such a sharp looking plane!