Rob,
I just kind of looked at a pic. Didn't have any drawings or anything, just knew what I wanted, and what would fit under my stand. I didn't document anything because it was a one off WYSIWYG kind of project for me. It's 6" extruded tube and 3/8" flat stock. I made a jig from a piece of plywood with a nail in it that I clamped to my router table to cut the circles for the flanges, they are not keyholed, only drilled and the bottom flange tapped. I couldn't find a big O-ring locally so I made a silicone gasket to seal the flanges. I had to buy a 10' stick of clear PVC for the bubble counter so I have quite a bit of that left over! But really like the pic I worked from all my PVC fitting are pretty self explanatory and standard. I suppose the UniSeals are the only other thing I couldn't get locally so I bought those when I was at Phishy Business.... The 1250 is plenty of pump but the Ehiems are pretty efficient and I found it used very reasonable. Those are my absolute favorite pumps, They'll run forever!
I have no intentions of taking this show on the road but since I have some extra tube I do intend to build a V2. That was my first acrylic project and I learned a few things. I either want buy of make some keyholed flanges with an O-ring seal, polish my edges a little nicer, and make the plumbing a little more compact. A little more of a show piece if you know what I mean

V2 will probably be very similar but with the addition of a second chamber. I think having the effluent tube at the highest point lets some CO2 end up in the tank. While I don't have a pH problem, and since I have extra 6" tube, why not?
As far as performance this thing is rock solid. My Ca is staying around 450. I'm using a Milwaukee controller and couldn't be more happy... at least until I get an ACIII!
If I can help anymore just ask, I'm not sure with what you do that I can help a lot but I can try!
Tim
