For the tow behind I made 2 heavy chains that I put on when I am about to vac up a pile they allow me to back up while preventing the vac from turning in either direction. Other wise they jack knife so quickly you would snap we got to try it for the first time today and it worked great. To bad a hydro pump went on one of my lazers and we managed to bump into a fuel pump on the tow away and break it. Some days I wish I stayed home. With our set up we expect to finish our clean ups in about 4 weeks and we should bring in 25-30k. We leave the box on for spring clean ups on the gmc but the new rams will come off this fall when we finish.