Dan used the same method from the vertical stab tip for the horizontal tips. However we decided to rivet the tips since we don’t think we will need to pull them off. So Dan created a strip of sheetmetal that mounts between the skin and the frame and extends out under the tip.
Still toook a lot of fitting and sanding
Notice we have a butt joint of the tip and the skin. The plans have the tip slip between the skin and the outboard rib.