WOW, no help.
This is why I have posted detailed information and pictures of important fixes for the Islander 28, seems help is most likely non-existent or long time coming.
I guess another area I will need research and post my findings.
While there are plenty of places to get information about propeller to hull clearances and distance from rudder, every boat is different with how they respond to certain changes.
There are fewer Islander 28's around then Catalina 27, so just takes longer to get the help, I'm OK with that.
I like a small cozy community, or a Catalina owner saying," nice boat, who made it, looks like the lines of a boat during the late 80's, what year is it?, what? a 1976? Where can I get one?
So, still waiting for help.