Weight tubes can sometimes be a hassle if you cut them a tad longer than need be. If so, you will have to get used to puting back on nocks. The solution for this, which I'm told but did not try, is to glue the weight tubes when installed.
I have just recently switched to using brass inserts, keeping in mind that the added weight will require a somewhat stiffer arrow. For example, I went from a .500 spined arrow to a .400 arrow. I'm not sure if everyone does this, it just seemed proper at the time. Anyway, the arrows flew well out of my setup.
good luck