Curently I am butchering a Fleet Cornell by Ken Uhrig and I have got to the wings. Now here I have hit a problem, the wings are in one piece and only have a spar and one former for internal support. Now the wingtips are intended to be rounded over but they have no slits in them like the halinski ones. When I tried to round them over I just end up with a bulge somewhere as there is too much material. Should I just cut some slits into it? or is there another way, I have scanned the wing so I have spares but I want to get it right please help.