I am a little concerned about how to manage the "lever" extending out over the bow. I want to keep the solution as simple as possible. With the boom as a lever I wonder how the base could be un pinned and hauled aft while resting on the bow crutch's roller. I have a couple of ideas. It has to be done without using supports from land. How about a second crutch in the Avon? Ha! I will work on it next.
Thanks for all the helpful replies. These discussions are great.
Ahh! There is the catch, not on land.
As a cheap backup, here is an idea you might consider if you are on land. Take three poles and lash them together in a tripod which you would stand on the ground to help hold up the overhanging mast end when inserting and removing the hinge pin.
I mentioned being on land because I also would like to be able to do it on the water. I like to go to different places, and most around here in Maine have overhanging trees or limbs forcing me to raise the mast while bobbing about on the water. And of course, there are always bridges.
But bridges are easy, just lay the mast down while still on the Tabernacle. It's getting it from the carry position, to attached to the hinge, that is where the devilish details come into play.
That really makes the dropping aft more appealing, due to less overhang. Does your boat have the raised cabin behind the mast like in the screen shots? I saw one production boat with the mast forward of the cabin like that, but it had a foot high tabernacle so the mast could clear to the rear. I don't think I have a photo, but if I find one I could post it.
I agree, this discussion forces one to get a better grasp of what's involved, and it's helpful to read other's concerns and insights. The best reason to have discussions, iron sharpens iron and all that.