I have made some more moulds in CAD to do two things.
(1) improve the fuse moulding quality by using outer male moulds over all sections.
(2) to allow me to try moulding directly into the outer moulds using a ballon to compress the carbon fibre.
I will do some more trials next week - the first version from this week is not too bad, and is nice and stiff, bu I wonder if I can make the boom lighter given the braided CF sleeve are 3k (quite heavy) - I will try and roll some of my carbon cloth as an experiment!