Btw..hydro gear has a website with email contact link... I contacted them once with a question and they got back pretty quickly why don't you send them all your information and see what they say?
I pull a sprayer with boom twice a year attached to a Craftsman yardwork dump trailer and a 15 gallon spray rig - the whole thing weighs about 265 pounds all in and when full. Been doing this for 4 years. I own a resi model Raptor w/ 52" deck and the FR series Kawasaki.
I wish I had a picture, but I welded a hitch assembly with 1/4" steel stock onto the rear guard and beefed it up...so add another 20-25 pounds for that, but it has worked flawlessly with no issues. I also haul a broadcast spreader on occasion and tinker with some crap using the trailer...but light duty. I know its not made for that, but.....