Wow, quite a job and supremely helpful! Your posts and pictures are exactly what I've got going on (minus the leaks). Thanks.feel free to reach out with any questions. You will notice that the compression post is not centered directly under the mast. My mast step showed signs of the compression post twisting due to the I beam failing and the post not being centered. I added a second compression post in front of the original that allowed the bathroom door to slide between the two. I reinstalled the original and the new one with a large carbon fiber plate between the posts and the ceiling to distribute the pressure and over come the off center effect.
about a third of my time was spent overcoming the leak. I ended up drilling and feeding conduit up through the ceiling, base place and into the inside of the mast then ran the wiring through it, sealed it at the bottom. I ran the wires through the finger of a vinyl chemical glove and placed the long cuff over the conduit all inside of the mast working through a 1.5" hole on the side of the mast. It was a pain but its not leaking! What the pictures don't show is that once the support was epoxied into place, I drilled two holes through its top into the epoxy bed it sits on then epoxied two stainless steel rods in to lock it all together. It isn't going anywhere and it can't rot.Wow, quite a job and supremely helpful! Your posts and pictures are exactly what I've got going on (minus the leaks). Thanks.