I decided to get the stern gland fixed, it was leaking a bit and I didn't want to hand pump the bilge all the way home if the electric pump failed. Had to go on the slip, and the slip only let their own tradesmen do the work. Took their guy 2 days to get the shaft out of the rusted coupling. He tried a 10 pound hammer on the shaft anode and a mash hammer on the coupling before putting a socket between the gearbox and shaft inside the coupling and using the coupling bolts as a puller. Might have worked but he used a socket that was bigger in diameter than the hole he was trying to force it through. All at a charge out of $100 an hour.
So $3000 later I had a gland that didn't leak but a shaft that vibrated. I decided to let it go until I got home where I could fix it myself. Using as little engine as possible I traveled from Townsville to Urangan and tied up. Thought I would have another quick look at the shaft, so put it in ahead with the engine on idle. Vibrating. In reverse, at idle, vibrating, then suddenly no vibration and engine smooth as silk. Right. The shaft had pulled out of the coupling and jammed the propeller into the rudder and water was pouring into the boat. Seems the slipway guy distorted my coupling with his over enthusiastic use of the hammer and then when he reassembled everything he missed the indents in the shaft with the set screws.
Just as well it happened next to VMR and a vacant travel hoist, could have been in a leaking boat without engine and rudder along the coast where there is no mobile or VHF.
So I now have a nice new polyflex coupling with the split coupling type that I love. Had to move the engine forward 1 3/4 inches to get room, so it was out with the engine to re-position the beds. 2 hours work to disconnect everything, 1/4 hour to rig the main halyard through the hatch as a hoist with blocks and a line fore and aft to position the engine as it lifted and another 1/4 hour the engine was on the cabin floor.
Needed a local mechanic to help me put it all back together, need 2 men feed the shaft into the coupling and to realign the engine to the shaft. Didn't take long and everything feels good. Back in the water tomorrow.
So sorry, a long story - but a good outcome.

Just enough room to move the engine forward enough to get the longer polyflex coupling onto the shaft.