i Have pretty much the same question. I emailed my question before I signed up to post but would like to include pictures with my conversation to better explain my set up. I did get an out of office reply though (5/25/12??) but I'm sure I will get a response upon her arrival. I do have another question though, how do you t-off the 1/4" tubing? Can you use the orange tool like you do with the 1/2"? I have a lot of overspray though which is what I am trying to minimize to use the system more efficiently. I also am not sure which plants to use drippers on. I have very large beds that are primarily perennials with some bushes that I don't think I need drippers on but I do have one raised bed and a couple of pots that I think the drippers work great in. I'm just not that familiar. I don't have the shut off valves you all are talking about though, I just set my timer for 45 minutes each day (due to the extreme heat). LIke I said, I'm familiar enough to change stuff out etc., but just not using the system to it's capabilities and my Lowes peeps are that familiar. Any advice would help!