Hi there. I wrote the CHEAP MACRO article. Glad you like it!
As you might see from the article, I'm not a big fan of teleconverters. There are various ways to approach macro work, depending on your needs and budget. If you have a big budget, buy a great dedicated AF macro lens. If you have less money, my article covers lots of stuff.
Here's what I do myself:
* I really really like using cheap enlarger lenses on bellows and tubes; great flexibility.
* I keep a Raynox DCR-250 and some cheap closeup sets in my bag always, just in case.
* I have many sets of macro tubes and use them often when I don't need to change focus.
* I have some manual-everything macro lenses. I love them & use them some, but not much.
* I have various mount-reversal rings for when I want to work very very close to a subject.
* I have a couple variable-magnification macro teleconverters but hardly ever use them.
* I usually don't reverse-stack lenses because I rarely work at such extreme magnification.
That's just me. Your mileage may vary. If you really want to learn about macro, get the classic
Field Photography: Beginning and Advanced Techniques : Alfred A. Blaker which is still a major steal at Amazon. Have fun!