Ha - yes... trying to soak it all in.
To be honest I simply followed Dick's instruction to alter the .asp file. (so no changes to the tiddler needed)
What would be amazing is if the script did actually call the sensor parameters as a variable to set the height of the FOV box. (might try doing that).
I REALLY like the web interface so doing as much as I possibly can there makes sense.

There is so much to learn, but that is much of the fun.