I've read a lot about CA glues in some of the forums, like will it cause brain damage, etc. It used to cause brain damage to me because I had so much damn trouble keeping the tip open. It doesn't any more, though, since I read a tip from some modeler that went like this: "Tap the CA container sharply on your work bench after use." Well, duh, I tried it and it works. (My wife thinks my brain is still damaged, but she always has.) It puts the glue back in the bottle, clearing the tip. I also use a piece of fuel tubing about an inch long to cap it and this seems to work great. Of course the 1 inch fuel line is stopped up at the other end with a short 4-40 hex-head bolt.