Anyone use anything other thanthe poly cutting board for the engine mount? I used a piece of stuff called UHMW, its a white plastic used on our industrial fixtures to keep from scuffing the product. I made my QHOR mount out of a 3/8" scrap. Worked pretty good for a while. I guess the heat from the engine finally got to it and it kept getting more and more down thrust. With about 45 degrees of down thrust it will really harrier. So I think I'll just start all over with a SPA3D.