I remember that step, but I had the wings off the plane when I did that. The trick I used was to cut the slot for the brackets to be an exact fit, so maybe that's why I never had an issue. I do remember placing wax paper down, then attaching the strut to the wing while the epoxy set.

One thing I did find out that is a must, brace, and cross brace, and brace some more the outer rib that the wing bolts to on the Fuse on the door side. It is very weak. If I were to build another I would replace it with 5 ply instead of the 3 ply from the kit, and double it up on both sides.