Quest Harpoon AGM Build, Part 4, Fin Alignment & Launch Lug

Here's why I didn't use much glue on the fins.

This many fins can be difficult to line up. Using less glue allows for easier re-alignment if needed.

The long strips are scraps from the sides of the balsa sheet, long enough to reach all three fins.

Here I used chip bag clips (clamped over the just the alignment strips, not on the fins) to get all three fins in line.

Apply fillets on three fins in a line, set the long strips and clamp over the alignment pieces. After the glue fillets dry - turn the rocket, fillet and align the next set of three fins.

The launch lug is centered and glued between the upper smallest fins.

I glue the launch lug in line with the engine hook.

With the fins in the way it's hard to scrape off the filler/primer down the glue line.

Wrap some 400 grit around a Q-tip and remove some primer for a better glue bond.