do you have any pics or plans of the different profile sections?
yes.
I even have a "top secret" idea to give an alu mast the same behaviour (specs) as a carbon mast for only a fraction of the cost. Although producing an alu mast as a one-off is never cheap. It is the series production that really makes alu mast inexpensive.
How much are you interested in doing some experimental work ? (a retorical question off course)
Wouter