The instructions for the accurising kit say that, as the side walls are narrower, a section of the rear tube of the cockpit has to be removed.
But its not clear just where to cut.
So i offer up the hull halves and, yep, it sure does need triming.
Cut a piece off here as you can see.
Put it back together and it fits now - with a massive great hhole at the back.
Trimmed off too bloody much *fume*