Thanks for the feedback folks.
Alan: Problem was not weight distribution needing triming for. More that (1) I have no shallow drive
and (2) was in a nasty position recently (by myself as crew were trying to recover sailing dinghies, trying to hold boat into big breaking waves, could have started engine from in the water and jumped in boat, but it was locked up and by the time I could have lowered it, I would have been on the beach). You can send other bits to either address!!
Ribald: Have posted a question, thanks!
Jace: Cheers. Found parts in the US, but not in UK. Will have to wait to see what marinepower suggest.