I hear you on the price of polypipe not going back down with the price of oil so cheap and crop prices low. We will be trying to use more 12" vs 15" this year. We are working with the pipe planner program to determine what will work and what hole sizes to use. In years past we have mostly used 15" and had everything figured out through trail and error what would work good. Most everything would water in 12 hour sets. Some runs now with the 12" we will be using smaller holes and longer run times but I should be soaking more water in on most of the field so hopefully we can go longer between watering.