Thank you sir for your explanation. I will stick with just the Plug Taps for my three choices as I think that will work just fine for me, at least for a while.Burb,
You can use a bottoming tap, however as you said, it is easier to use a plug tap. If you are concerned with the Bock or Jowo taps, a plug tap will work fine since you will run the thread all the way thru the hole.
The bottoming triple lead taps are used when you want to make transparent bodies for you pens. They show up a nicely threaded hole instead of having partially cut threads showing.