What's CLR? Isn't it some stuff for cleaning pots? And you've lost me on the torsional stuff - I get the idea of different profiles for different purposes. As far as working out the mast actually needed, I'd be somewhat inclined to go with AP's specs as there's a pretty good chance that his nasal hairs contained more info re rigging than this BOLB. Anyway, Tassie's the destination donchaknow so overbuilt = kosher in the BOLB book!
By the way, that Struen Marie's in Southport now but due to arrive at your place for Christmas. There's a chance we'll have a look at it this Wednesday.
I'll keep an eye out for that hat too Gary!