Inspired at large by Ica's custom x-wing cannons, I had a crack, with the idea of using trimmed needle eyes for the cannon tips
Follow Ica's tutorial, with the following modifications
Trim the needles about 1mm above the bottom of the eye

Cut the rest of the needle to size

Insert in the barrels in the holes that you have drilled

Will update once I attempt painting, failing to meet Ica's standard by a wide margin

