Having seen it's potential I was keen to make one myself and save £300. Here's my proto-type based on some ideas from his, but also this New Zealand self designed one
Deck arrangement. The shrouds will be shortened now I know the lengths I need and just unclip from the deck. The forestay also raises and lowers the mast and the mast step is jointed to allow it all to fold down along the side out the way. It can even be reefed by tying up the sprit to the mast.
I'm just waiting for some ripstop non-porous material to arrive, along with some webbing and bits and I can make a sail to be proud of.
Beren likes it!