Even easier:

If it fits, borrow my mold, make your own seat copy (or several), and bring it back!

Improvements: hot glue temporary foam "additions" to it before making your copy.

shawn

: Shawn built a Fiberglass seat which was a lengthy process requiring an
: initial mold, a negative mold and a finished mold. I wonder if anyone has
: come up with a way to do it with one mold, if it would work better for
: rolling with a very low back support and a strap support and how far it
: should extend under your thighs for support. I've tried his and it was
: quite nice so want to buiild one but want to cut out a couple of steps if
: possible and improve upon it if possible.
: thanks
: don