I did my work today with the middlebuster plow that converts into a sub soiler and it worked great! I only wish I had seen the contraption that will let you lay it as you go. I tried the plow head first then went to the sub-soiler, my ground is hard but when I added 75lbs to the top link hitch pin it helped out a bunch. Thanks for the advise and I think I will be making me one of the sub-soiler pipe laying rigs