Making it with a stiff handle would be very difficult. BUT, if you made the handle very small, put in some deflex, and you might have it. Ryan's bow was 50" ntn and pulled to 27". If you put in the deflex, you could get another inch of draw, and got the handle as small as possible, maybe one more from the same length bow. So, if you modified the design, you could maybe, MAYBE get a 29" draw from the same bow, and because 2" of bow length equals each inch of draw, you could perhaps shorten it to 48", and still getting a 28" draw. This is in theory now, I'm not sure if it will work out.
Sean