Tell us about yourself!
Is the drip line in the 1/4" holes just chunks of regular drip line? Since your design is pressured, do you have issues with them popping out? To get a drip effect, do you regulate the flow down until it changes from stream to drip? Is the rate of flow consistent across the entire span? I was going to go with a three row, gravity fed design and have wondered about the drip hole size.