I saw some drip systems online that were going for the same price I put my whole grow setup together, including my lights, tray, bucket and pump.
Just make it, its easy, took me 30 mins to set up my drip lines, and I know how it works, how to fix it, and I can expand it as needed. Prefab comes with support/warranty, but looks like there is more than enough of that around here, and you probably dont wnat to explain to them your issues, heh.
(not to knock you glyph, ive been browsin the forums today, and sound quite accomplished.)
I ran 1/2inch tubing around my box, and punched holes in it where I wanted a drip site. (they sell the punch where the tubes are, mine was like $2) Then, I put 1/4 two sided connectors into it. From there, ran 1/4 piping up each to .5gph drippers. I was worried about back pressure, so I just put the end back into the bucket, above the water line. Figured this would airrate the water, and recycle the unused water. Im growing in rockwool, and its high porus, so I was going to water for 30 mins, to saturte just barely, and any runoff goes to a waste bucket. Water that didnt hit the plants never sees light or air. As plants drink more, I can increase the frequency of watering. If it really gets outta hand, I can just snap on 1gph drippers, or larger.
I havent had any issues with it being equal on all of them, but I only have 9 sights right now. If you connect your pump to PVC, you can make a large length of PVC to run the length of them, then run 1/2 tubing from those, and do as above. Youd have a lot more connectors though, and that would increase the costs. Maybe 8 T connectors, and tons of hose connectors, and hose clamps.