koya, I did exactly that when tapping I only ran it to about 1/4 the way actually. just enough to give me a good tight fit but be sure it was lined up to the hole properly. As for trimming them I have an occilating saw that I use when needed but the fittings are just a tad under 1/2 inch long and boards are a tad over. But I did have a couple that were longer so I used the occilating saw by threading a piece of scrap cutting board and then cutting the fitting with it in the board.

Thanx for the info though.

iger I forgot till just now I dont think madscientist uses anything but just water. So that would require research before use.