RE: Monolith lighting
You may find this pdf file useful.
http://www.culttvman.com/assets/Model_Lighting_.pdf
I chose to assemble my monolith with the rear side held in place by magnets, so that all the internal lighting equiptment was easy to get to.
I also went as far using 5mm green leds installed into each of the guns, with holes drilled so that the light reaches the small rods.
My main source of light for the interior ended up being a flashing christmas light bulb that effectively illuminates the crystal, portal, and rear circle (once it was cut out beneath the circle.)
*The formula in the pdf file is critical for not burning out the leds when using them in series and parallel, and for determining the correct size capacitor needed.*
If you need any pics, I can take some and post them to the web/gallery, or email them to you.