wire the LEDs and resistors to the three wat switch with the top position being blue the middle being off and the bottom being the orange.
when all has been connected wire the battery socket and the lighting system is done.
take the solid 29mm acrylic bar and sand with a rough paper to make a diffuser. this is what the light will be placed at the end of to give the glowing portal chamber.
inside the clear 65mm tube the light bar is held by two more acrylic discs and on them are some detailing (in the pictures i have used two large format printer spool ends.) but use whatever you have to hand.
wrap a small amount of tape (preferably black) around the clear tube with the light bar inside at the end points where the support discs are. make sure the discs are wide enough apart that when in the main gun tube they are just inside the tubes and not visible.