I box the plug in and tamp cold sand, bentonite mix around the plug to create a mold . Then I remove the plug and pour hot lead into the mold.
I sort of skipped over the rebar and welding stuff together.
BTW, I now see it is possible to make a run at the mono hull record, perhaps this coming winter.
The sail rig is worked out, the sails are on board. The math works, the shake down will tell the tale.
This kid is the record holder and the youngest to do it. Record or not I would be the oldest to do it just finishing.
http://www.bbc.com/sport/0/sailing/21219773