Wing tip ribs are used as reinforcements of the trailing edges of the epoxy wing tips

The triangle is fitted in place to be in line with the ailerons. After fitting, I drilled the tips to the epoxy wing tip.

A close up image of the wing tip trailing edge.

The fibreglass wing tip has aluminum reinforcement strips on the inside to strengthen the bonding point. This is done by #6 screws and nutplates. You can see the alignment of the wing tip rib with this reinforcement strip in the image below.

The wing tip needs to be trimmed to fit the bottom side of the wing.

Still had to install the one ear nutplate near the end of the reinforcement strip.

Cleco clamps are keeping the rib in place during match drilling.

Finally, rivetted the wing tip in place with AN426AD3 rivets.