I just finished up my ruffkins, but I didnt use metal parts... however, I did see metal brass fittings at Lowes that match the connections for the 2 hoses. near the plumbing section.
with metal laser cannon things , which at first I wanted... saw some of those at lowes also... it was not large enough to put in the LEDs I wanted. the resin ones I have look like metal now that I am finished, and I was able to drill them out through the middle and add LEDs that turn on using the switches.
I have some left over momentary switches, the ones that people recommend ... if you need them and will be at Mega this weekend I can bring them there. Just a few bucks was all they were.