RE: High wing loading & fast planes!
Yes, it is a SWR. The wing is totally flat on the bottom and the high point of the airfoil is at the 40% chord line. For the fuselage I followed the outline in the side view, but made the fuselage the same width as the engines' backplate. At this size and weight, the 4.2x4 APC really works well, but you need to give the plane a good throw to get up to flying speed quickly. I also run the engine on bladder which allows hard launches without risking fuel starvation. Bladders don't foam up during the run, either. The control throws have to be very small, like 1/16" on the ailerons and about 1/8" on the elevator. The pivot for the clevis on the elevator control horn is about 1" from the surface of the flap. The fuselage is all sheet balsa, except I made the mistake of shaping the turtle deck out of foam.....would have been better off carving it out of light balsa and hollowing it out. To do a good job of scooping out areas like this, just jab a pin into the wood to gauge how thick the wood is in that area, and you can get a pretty uniform wall thickness. There should be a past build thread for this plane from a couple of years ago.
I say go for it! Build it!