I spent an evening cutting and assembling the Pep, but I soon abandoned it. It was HUGE and didn't seem in proportion either. I reasoned that once covered in resin and filler it would be too big and not the correct shape.
So I needed to build one from scratch.
Step 1: Basic construction
I cut one section about 10" (26 cms) long from 1 1/2" (38 mm) diameter lagging and one section 2" long from some 2 1/2" (65 mm) lagging. I carved a curve in one end of the smaller diameter to mate up the the larger using a sharp knife, then using cocktail sticks to strengthen the joint I glued them together. This gives the basic general shape and already looked better proportioned than the PEP.
I then added a flat section, a piece of a barrel and then gave the entire thing a coat of resin. Once cured I filled some of the gaps and sanded it back. This leaves a thin hard shell over a lightweight foam core.