Spent the evening working on my HF1E project. Today I made up a tool to help guide a 3/4" NPT tap straight so I could tap a port on the tee I am using. Even though there is only about a 1/4" of material to tap through, it was quite tough. Since pipe threads are tapered you are always cutting material off of the walls throughout the length. I could only turn the tap about a 1/8 of a turn before backing up to clear the chips. In the end I got it tapped. Now it is time to do the other side, which requires only a 3/8" NPT tap, so that should not be as tough.
Charles Baetsen holds a Bachelor and a Master's degree in Engineering Physics from McMaster University in Hamilton, Canada.