Just sharing a build option. I used the WOF plans and made several card board molds that I layered fiber glass/resin into. I used a release that allowed for most of the card board to easily peel off. I then assembled with fiberglass to build my jet pack. Plenty of Bondo needed. I detailed some of the parts builds in other threads. This is not an easy build, but here are some images. I made all the aluminum parts too. The stabilizer was made in part from a cheap Exato knife. The beacon was aluminum rod I shaped with with files as it turned in a drill press.