Criag,
superb mate!! Does OCD mean anything to you? hehehe

Now I'm assuming you use the candle to heat the tubing enough so it will etch into the primer?

I have been playing with a pice of control rod on a small handle to create flush rivets that have the slightly sucken look. Light pressure, a few circular movement and voila! a flush rivet is born. Looks quite good on the 51 flaps

cheers
Peter