Re: rudder shaft packing gland
We did ours last year, in the water. It was marginally below the water line.
I like the idea of toilet was/wazzz or WAX. We used well wrapped Walmart bags, pushed in with a screw driver. Worked on our prop shaft replacement, too!
The rudder shaft, obviously, doesn't get the abuse that the prop shaft does. We still used Gortex packing on it though.
BTW, when I say we did ours - it was the packing, not the whole gland.
San Antonio/Port Aransas, TX