Hi simba, the only way I know of is to use filleting. You will need to prepare your surface before trying to do a surface/surface fillet on it, you'll probably need to divide it in to 2 pieces, cut away some amount so the pieces are not touching along the trailing edge, then use ShrinkTrimmedSrf on them so the actual underlying surfaces are not touching, then select the 2 separate surfaces and run a fillet with the "constant distance" option. It's the same process as the previous time, that previous discussion thread is here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=7023.1

- Michael