In my opinion, two-part epoxy is a much better and forgiving alternative to CA. Back in 1999, when I first started turning pens, I used CA. But after a couple of tubes got the dreaded "grab", I switched to epoxy and that's all I've used since. It has an odor, that may be unpleasant to some (my son hates the smell of epoxy), but no toxic fumes. I normally use 5 minute epoxy for one or two pens, but for the odd times I need to glue up more, I'll switch to 15 or 30 minute. Plus you can color epoxy if needed for acrylic blanks with artist paint (50 cents a bottle at Walmart). Can't color CA that I know of. If you're in a hurry, I've started turning a pen in 10 minutes before with no failures, but I recommend waiting at least a half hour. Epoxy is more forgiving, no fumes, and gives you all the working time you need. Oh, and it won't glue your fingers to your face. I see no reason to use CA for gluing tubes.