I just didn't like the interplane struts without reinforcement of the screw holes, it seemed the liteply would wear immediately.
So, I got some extra 4-40 blind nuts and glued them into the i-struts. They're installed so the cap screws tighten against the back of the nut, like a built-in washer and sleeve. Then the threads were drilled out so the screw slips through and tightens the strut against the wing mounting tab.
Other ideas on the fubarhill site, thanks to Eric Kler!
Viva le Hog