$3 for a 5-pack of automatic pencils with ergonomic grips. Take the grips off, cut them in half, and you now have 10 rubber drip tips. These fit absolutely perfectly on a 510, but i cannot speak for any other attys.
I use it all day long.
Now, I realize that this is a pretty old trick, but this is the new members forum, so... someone's gotta learn about it for the first time here. Just an FYI for those who didnt know.

I use it all day long.
Now, I realize that this is a pretty old trick, but this is the new members forum, so... someone's gotta learn about it for the first time here. Just an FYI for those who didnt know.