I recommend anyone who is looking to create their first Gizmo with out too much fuss go read through his tutorial. I used Exoray's images for the print out which is a great resource.
My build differs from TheRockman's only in a few places:
I used a piece of acrylic from Lowes instead of styrene for the board
I did not put LEDs in the pen tubes that stand in for the nixies (though I will be looking for a small string to place behind them , maybe)
Inside the pen tubes I used a small piece of vellum, essentially semi transparent paper like tracing paper with a crudely hand drawn digital number shape, this is in case I do decide to illuminate from behind. The wires into the base of each faux-nixie are from an old ethernet cable I cannibalized. I drilled holes using my dremel and thread the wires from the back of the board up into each tube and then secured base with a bit of hot glue.
For the wire behind the white chips I used some gold floral wire from Michaels instead of paper clips.
I used some black foam core for the black Sanyo chips and 1/8 styrene for the white ships instead of all styrene.
For the holster I have used those black Foamies sheets you can purchase at Michaels or Joann's Fabrics. The sheet that actually holds everything to the belt is the thicker variety which I believe is 6mm and the front piece that overlaps the gizmo is the thinner type. At first it may seem the foamies material isn't strong enough but I believe it will hold up well, atleast for Halloween.
The round bits under the nixies were also made using some thin green foamie sheet cut into small double circles like a figure eight folded over some floral wire and super glued.
I didn't think to take pictures in the process on the main board but I took a few on the daughter board.