How long of riser ? & what thickness backing ? You would probably ok with the fire hose form & a simple strait form would be easy to make , I did some exspermenting a while back with heating bending thicker wood lams & found I was getting some light cupping in the bend I came to the conclusion I needed a male presure peace to insure a smooth bend , I was bending 1/8 lams I never made a all wood lam bow with that tight of ramps but played with the idea I think it would depend on the thickness of the backing lam , I know there are guys here that have used as thin as 1/16 hickory , Im curious what over all taper rate your thinking ?