tube gluing help

I just picked up a few of the Berea El Grande kits and find the instructions and methods used much different from any other pen I have done to date. The cap end has two tubes a smaller one that fits in the 11mm hole and a large (short) one that fits in the top end. On the upper cap blank...

Hello all, I am looking for some advise and require your assistance please. When I glue my pen tube into the pr blank air bubbles are getting trapped between the tube and the blank after finishing you can see the air bubbles. I have ruined 2 blanks this way and would not like to mess any...