A pontoon friend of mine had to change his vetus type 10 coupling, which I suspect is the part your have to remove in order to pull down the propeller shaft. Mai problem is accessibility (very typical for nauticats)
I kept pictures and notes (notes are in french but google translate can do very acceptable miracles) he passed me along. I’ll try to attaqch them in a further post.
A mecanic on the La Rochelle port changed my stern gland and billed me very little amount of hours for that thus I suspect it’s quite an easy job.