I ended up using a Soldering Iron to make all my cuts/holes. at times it went very slow but much safer than that hole saw.

I got to say – Dirt in this system would be a disaster. The clay pellets are the way to go and once you have nutrients and every thing set up – maintenance is very easy. So far I am very impressed with the performance of this hydro set up. This is also my first [...]

20 bucks max.

I have mine running 15mins on and 15mins off – 24/7. I’m pretty sure I saw it in the documentation:
http://our.windowfarms.org/instructions_dev/?language=2&section=10

It was a bit of trouble locating a timer that would do 15 min intervals. The cheap ones at the drug store would only do 30 mins.

Very impressive and clean system. I like it!

I like the tubing color, wood stand, and triple bottle design. Great Job!
you could probably do yourself a favor and increase the reservoir size (1 gallon?)

I really like the root cover idea. Although I think just using the aluminum tape strips would have been enough without the extra layer of electrical tape.

I like your mod for the bottle cap. Ive been wondering how I am going to build that part using a standard cap. I too thought the air needle design was a bit too complicated.

it would be great to know where I could find these online.