wasp: Did you compare commands to PT3.62? :-)
Nope, even if PT3.15 is actually my weapon of choice, I always test it in 2.3d before releasing, since it's (according to me) the demoscene standard. It's also a good idea to try it with PT-replay, Hippoplayer and ThePlayer too, especially when experimenting with E commands or other quirks and tricks. A module that works in 3.xx and not in 2.3d is just not right.
A bit more on the topic: I really enjoyed doing this tutorial and I learned some cool stuff myself in the process. I'm was really happy to find the EDx overflow thing. It opens some undiscovered doors. Too bad it's not compatible with replayers (yet). I developed a nice little headache when trying to explain the EFF thing too, but hopefully this will make people use it.