Well, if you catch anything on the outside edge of the plow (even something small, like uneven concrete) you have all that leverage on only 1 center point. You easily twist the hitch sideways.<p>Furthermore, a pick-up (or 1 ton) plow truck weighs 6-11,000 lbs. with all equipment. There isn't a Class III receiver that can withstand a shock-load with that potential weight/speed.<p>I've actually never tried to plow with one, (a hitch-only mount) but based on all the different back-plows I've seen since 1975 (almost everyone in my area has a rear plow) and all the ones I've seen come apart, any receiver-only attachment just wouldn't hold up. I suppose a more conservative plowing approach would help.<p>We've also saw plows that have the cylinder attached in the reese hitch and 2 more reese inserts connected with a bracket on the back of each frame rail that spread the shock over a larger area. Those seem to hold up okay.<p>I thought the hitches we only rated at 500-1000 lb. tounge weight. A rear plow downpressure will support the weight of the back of the truck (30-40% or that 6-11,000) and when you go over uneven ground will pick the rear tires off the ground. (We had one that picked the back tires off on level ground - had to adjust it) <p>Anyway, I feel that's just WAY too much (potential) stress to put on one point of 2"x2" of 3/8" tube steel.<p>