The Weaverbird sail looks beautiful, and the restoration job is lovely. I enjoyed the video and the blog (at least the pictures). The only thing which concerns me a little is the gas bottle located in the galley.
If it were my boat I would put the gas bottle outside, maybe in the self-draining cockpit, and have a shut-off valve mounted on the outside bulkhead, but with an extended shaft so the handle is on the inside and can be reached without having to go on deck. Alternatively, there are 12v solenoid-actuated shut-of valves available, so you can turn the gas on and off from the galley by an electrical switch - that's an easier option to install and the option I have always used, but they are a bit expensive, don't last forever - and that way you are unable to use the stove if you have a flat battery or an electrical fault.
When Marcus took over Havoc, he didn't want a solenoid valve so we modified an ordinary shut-off valve, so the shut-off valve is on the outside, with the bottle, but the handle is on the inside, next to the galley, and as far as I know that is working satisfactorily for Marcus.
Its good that you don't need gas pipe on your installation (though the flexible rubber gas line available these days is easy to install and make gas-tight) but regulators have been known to leak and you don't want that anywhere near a flame.
If you are using gas, you do want to be able to close off the gas without having to go outside. But I think it is worth going to that little bit of trouble to put the bottle, regulator and the body of the shut-off valve outside the closed cabin.