I just wanted to say how pleased I am that I was able to exactly accomplish what I was striving to do; offer custom category templates with custom sidebars and headers. Your system is brilliant! I have tried to work with other systems to do the same thing and have gotten trapped in seemingly infinite loops trying to kludge together solutions.
Initially it was a little bewildering trying to wrap my head around what content to create where and how to set everything up, but I now see the amazing potential your system allows for and the flexibility it provides.
Thank you!
Dave