We built our own set for our MX-240 using a pair of 250 gallon Ag Chem tear drop tanks that we already had. I used 8x8x1/4" tubing to build the main frame work and added cross pieces of 3x5x1/4" tube to bolt the tanks to using existing holes in the tank mounts so they can still be used on their original frame. The main frame hangs from the tractor from a piece of 1/2" plate bolted to each side of the frame, four 3/4" bolts and the whole frame can be lowered to the ground and then you just back the tractor over the top of it. There isn't much room left to climb into the cab with these but our neighbor has a set of Sprayer Specialties tanks on their MX-200 and they aren't any better.