Originally Posted by tlj125

If you look at how I did mine, the wood has been counterbored so the screws can work at the standard length. The blocks are glued with Hysol to the main spar in the wing top and bottom. The wood I used was hard maple. The maple goes all they way through the wing. I cut through the covering and sheeting with a #11 exacto and found the spar then opened up the hole to have a tight fit with the maple blocks. I cut the blocks to size before gluing, tracing the wing profile into the block and shaping with a dremel after crosscutting. Then drill and counterbore holes(9/32 and 7/16 drill bits). Then locate the mating blocks in the fuse, glue (again with Hysol), and "line" drill and tap from the holes in the wing. I later added the screws to the blocks in the fuse, just in case.

Looking as hpw you are doing yours, I don't see the load applied to the spar. Maybe I am just missing it.

Terry