I have installed an 8 zone sprinkler system in my back yard of about 2 acres with a middle buster and a subsoiler with varying degrees of success. I use the subsoiler to start the trench, break roots, or identify large items which must be dealt with. That works fine and also to pull wire. I have not had great results pulling pipe for several reasons.
Now I am about to add a couple of additional zones to the system and some waterline to new faucets. I have used the middlebuster to make the trench with a 12 and a 14" furrow and now have a small 6" furrow to try. The problem with the middlebuster is a lot of dirt falls back into the trench after you get below a few inches. I am wondering if a different type of plow would roll the dirt out of the trench better.