I had a sinmilar dilema some time back. I ended up getting a c/f tube with sleeve. I then got a piece of tube slightly larger than the sleeve approx 24 inches long and filed sawteeth on the end. I also got a block of 3x3 hardwood approx 6 inches long. I then set the wing up with the original dihedral brace and blocked it up on a straight bench and set it so it was sitting even and true and cut a pair of supports to sit under the last full rib of each wing half. while set up I checked where I wanted to rod to sit hieghtwise and there by figureing the hieght on the block to drill the hole for the pipe drill which I then drilled on my drillpress, making sure the hole was drilled straight and true. This I then clamped end on at the edge of my table, and using the suport I set the wing against the block and carefully drilled the holes for the tube through 6 ribs in total (depending on your rod length). I did the same for the other wing and did a dry fit . Youy will need to open up some bays in the covering next, 1 past the ribs with the holes. I then cut round disks out of 1/8 liteply with an inner hole that was a close fit but not too tight, just so you could slide them easily on the sleeve. you will need 2 disks pewr rib except for the joiner ribs and the outer ribs which will be a solid disk to stop the sleeve and tube sliding further in on the outer ribs. Then you cut the sleeve to fit to each wing. Now the fun part. remove the tube and sleeves, nmake sure everything is clean and dust free. Then take a sleeve and slide it in with 2 disks in each bay, and do the same for the other. I now wax the ends of the c/f tube and then slide it in to the sleeves and align the wing halves again. once thats done you glue in place all the disks and the end cap in each wing. Here I use 30 min epoxy and 2 spring clamps per rib on the disks.. after clamping all the disks, check the alignment of the wings and clean excess epoxy. I do not glue the wing joiner rib disks at this time, as any seepage will permanently join your wings. after glue has set you then seperate the wing halves and glue the joiner rib disks in, and all thats left is repairing or replacing the covering.