Here's the first pic from our (Myself and KahunaFett )scratch build jet pack made from Wizard's blueprints. The taller missile is made of cardboard, while the smaller is bond paper. The smaller should be the correct scale (86% of WoF's drawing) for a 15" wide JP. This puts the missile base disc at a diameter of 3.5 inches.
We're now attempting to cut parts from sheet styrene... more to come.