Neat set up, and a fine show Jim. Thanks for sharing!
Tommy i think the valve is original from KMV?
At least these and the SS Chinese fish-tank valves are amongst his "extras".
http://www.kleinemeier-modellbau.de/03c1989f4a0f98601/index.html
Jim, there does seem to be an original deeper gelfuel burner available there as well 
Thanks Jan, yep that valve was already there.
The deeper gelfuel tray (either bought or made) is a must have using Gel (which is new to me) I must say...I really like gel!