Plan:
Find different vantage point from last session
Adjust aperture to get ambient exposure right with a 2.5 to 3 second exposure.
Set up TT to take exposures of 2.8 seconds with a 0.5 second gap between exposures.
Frame shot before display begins.
Set camera to bulb and manual focus
get ready for display to start
press start button when display starts
stand back and ooh and aah at the display like a 5 year old
it worked:
Looking forward to going again as I started to play with some other effects, "Beam me up Scotty"...