I built up the first of the new plane carriers this evening. The design works great. The lower cross piece and the handle are 3 layers of 6mm birch plywood with a relief in the middle layer for a 6mm or 1/4" dowel. I happened to have some 1/4" aluminum rod in the closet, so that's what you see in the pics. When I get back from KS I will stop and get some carbon tubes just to be cool... The racks are available in 4, 6, or 8 plane sizes. I used some anchor bolts and nylon wing nuts to make the racks easily removable for travel.
I think these are going to look great after they are sanded and painted!!