Do you have some pics or link to a tutorial? This sounds nice.
Let me see what I can do...here are some pics of what I got going. I would have it all in the hydroton bucket setup, but I rushed in extra plants late, so I just popped in em coco. Anyhow...
I took one pic where you could see it all, and see that the 3.5 gallon buckets are sitting in the 5 gallon. The 3.5's are light green and pink (ran out of light green at Lowes!) and the 5 gallons are white. Then I took a close up of some of the holes I cut in the top. They could definitely be a lot cleaner, but as long as you have enough that it's impossible for your pump to overflow, you're good. I use a 130gph pump, so it's pretty weak. It takes about 4 minutes for it to fill both up, and I let it flood every 4 hours for 5 minutes while the light is on.
Then you can see the splitter and where the tubes go through the 5 gallons. I don't have pics of inside the buckets, but the 3.5 gallon just has a nozzle (that the tubing fits on) screwed into a flange (put some of that white tubing tape wrapped around the creases before screwing in) and siliconed into an appropriate size hole through the bottom.
Then as you can see in the pic of my reservoir, I just have the two small pipes pointing straight over the top of the reservoir. They are also screwed into a flange and siliconed into the bottom, on the 5 gallon. It's dark enough that the flash auto turned on when I took that pic, which is simply panda film covering the table with small holes poked through for what needs to go through.