Problem with using the edges as a frame is as soon as you landed on the skis or even got going at a decent speed the vibrations would knock everything loose. Maybe if you got some gnarly gorrila glue or something then got everything nice and snug with wax and laminate it would hold. If you do decide to try the brace or using the edges as a mold post some pics and let me know how it works.
this guy doesnt know what hes talking about. during the summer there was a lot of people doing that just get them real hot, put the tips on a rock or something to keep the tips off the ground and then put something to keep the center of the ski on the ground. like a truck. people have done but after a while the ski bends back.