Just to bump this thread:
I posted the latest X10 Halloween project here:
http://thisautomatedhouse.com/Halloween.html
Cool. One of my old DIY articles from the defunct "Popular Home Automation" is linked on the right (X10 Thermostat Control). That's like ancient. Knightrider should do a DIY on his pipe organ.
Not gonna happen. When we did the initial build, we used WAG Engineering Inc. Put 80 psi on the storage tank, and watched flames shoot over 50 feet high. That thing is an accident waiting to happen. My co-haunters and brothers all happen to be firefighters. I would never want anyone to build this.
The original ran on kerosene, but in later years, this was changed to ethyl alcohol mixed with boric acid. The lighter weight fuel eliminated residual burnoff and the boric acid produces green flames.