Looking at B_R's thread a few weeks back made me want to try something similar with my DM. I had previously tried LEDs for the GI in Black Rose, but didn't like the results. I must say though, so far I am very happy with how this is looking in Demo Man.
All Cointaker frosted, mostly blue, a few purple in the upper corner and some cool whites under slingshots/ramps and other plastics here and there.
Had LEDs under the inserts for awhile now, but experimenting with different colors cuz I was tired of mostly red and orange....comments welcome.