Good points. I haven't worked out the exact location of the wheels or the required rotation forces yet (but the anticipated force is one reason for the big horizontal tails). During rotation the main wheels will move forward towards the CG so at stall angle it will be close to balancing. One thing about the very long stroke gear is that as you rotate the craft will rise quite a bit and still be on the wheels, which moves the prop further from the ground. A hard landing would be a different case, life's a gamble.