Hi Paul, I mainly use CA glue on my pens, not everyone's cup of tea as you can see by the comments here. Firstly it does not like any form of expansion. As you have found out it will CRACK! So the ends need to be perfectly finished. The ends need to be sanded back to the brass tube so there is no pressure on the CA when pressing in each end. Don't over do the pressing! Before that ensure the inside of the tube is free from contamination and clean. I always offer up the parts of the kits I'm using and gently push them together by hand before moving to the press. if it all feels a little tight then out comes the rats tail file to ease things. It's a fine line with CA as it will not expand without cracking! I also seal the ends with very thin CA without hardener before turning the blank. The CA soaks into the end grain. Most importantly, always wear the right mask! CA is nasty stuff! Good luck, and remember, practice makes perfect.
