Ok irrigation guys, I need some help! I just bought a DitchWitch 655 with a trencher and the vibratory plow. I want to use the plow on existing sod / turf. Tell me how different it is based on a traditional trenching install. Do you hand dig the individual sprinkler and valve holes. I plan on using glued-on saddle. Im thinking of using a Stihl Hand earth auger 3 to bore the individual head holes. Good idea? Like to hear what you think? How can I make plowing easier to install. Thanks!