I've was looking at a 10mm carbon tube from each bow to the pole tip and that was it.

I was also working on a shooter type device to be mounted in front of the main beam. I was working on a design that I think could be made quite easily. Virtually a home made modified Marstron setup. I think the Marstron shooter is a briliant concept but I was told it gives the kites a very short life span. This concerns me because that makes the setup expensive replacing kites on a regular basis.

I still think this would be the most efficient setup.