Thanks very much for the advice everyone.
Damian paddles bougy and shibui - yes i thought it needed further taper - i chose to defoliate it as i believed it was an ok time to do and I also wanted to get a good look at it bare. The bar branches do need attention and they are thickening higher up the trunk than i'd like. I've not had any experienc with tridents before and i'm assuming from your comments that they throw good back budding and foliage for future primary branching?
Guy and glen - thanks for the encouragement - i have never air layered before but getting two trees for the price of one sounds good to. I have to hit the wiki pages to see the right time to air layer a trident.
This tree seems to throw several potential branches from the one location on the trunk - and in a wheel pattern like a pine.... is this typical of tridents? If so then i spose you'd need to chose the best branch and cull the others.
First trident - first airlayering... it will be a tree of firsts - but i will go and cull the bar branches - point clearly taken.
Cheers and thanks for the advice everyone!
Stewart