(N.B. occasionally Google updates Blogger but screws it up at the same time, like when you decorate and knock the paint over the carpet. During this period I shall resort to using the Verdana font instead of the preferred Work Sans. Get over it...).
Fresh from revising the template for the original prototype appearing on the website I collect the materials to suit in order to rebuild it with a modified keel to suit a 22" propeller... of which like Del Boy I've eight in the garage. The materials of choice on this occasion are Wickes' 3.6mm plywood and B&Q's 25mm-square timber spar, as each do one product but not the other. Fortunately they share the same retail park, where you can also purchase (as I did) McDonalds sausage-and-egg and flat white.
The first step is to cut according to the 23/25" template, using the former for a keel and the latter for a deck. The former will be double-sided and we lay out each keel-post along with the 25mm insulating foam, and underlay each with a dust-sheet. This is because these are spray-glued in place and I don't want to stick to the floor afterwards.