I clecoed the wing structure together and temporarily hung it on the wing stand for drilling.
The wing stand uses 1″x1″x1/8″ steel (with some aluminum flashing tape to keep from scratching the spars).
Here is the outboard end with a scrap of aluminum angle bolted to the last rib as a mounting point.
I didn’t get any shots of it, but I match drilled all of the holes that connect the ribs to the front and rear spars.