Only way to improve on that would be to add some photos of it in action.
( I know, that's the first thing you're thinking when you have your rig hanging in the air ;-) )
I may do the same but add a winch to the side of the mast, and a cam cleat.
I plan to trailer launch my boat and I will need to get the mast up and down with only human power.
I would like to see other ideas / designs for Gin Poles to do this. I have found very little online. I assume this is a common practice, and it's always better to learn from someone else's...
I have the sliding hatch covers.
They are in pretty good shape, just need to be cleaned up. I will remove them and get better pictures soon.
The louvered vertical wood piece is in really bad shape (I did not bother taking photos)
Hull (deck actually) is toast.
Many parts available including Winches, Traveler, Boom, Bow Pulpit, Stern Pulpit, Rudder (Old Style), Hatch Covers (Old Style) Interior sliders, breastplate, Bow chocks, blocks, Lifelines, stanchions, etc.
I might keep the mast to make a Gin Pole, unless I get a...