Centuri Skylab Build, #KB-4, Part 18, Docking Collars

The docking collars are set into holes drilled into the body tube.

Start with smaller diameter drills and work up to the 1/4" diameter needed.

I simply finger twisted the drill working it into the body tube.

Don't worry about the rough edges.

Push them to the center - 

Round out the holes and push the rough fibers into the hole with a sharpened dowel.

Set the dowel in the hole and twist.

Don't enlarge the hole beyond that 1/4" diameter. Check the fit of the docking collar and try for a friction fit.

The docking collars were glued in the holes using Fabri-Tac.

This is turning out to be a very detailed model.