Need some help from you guys who run a back blade behind your M. I'm ordering one tomorrow from everythingattachments.com, they custom make them and they look built to last. The 6ft weights 325lbs and 7ft weights 345lbs. Two questions: Will the Saginaw hitch have a problem lifting these blades? and Which will the M pull better? Mind you I am going up hill at a decent grade for about 800-1000ft and with my tires all the way in the tractors 7ft wide. Thanks for the help, I was looking at the WOODS RB84 but they want $850 and this other blade is $700 with free shipping and looks just as heavy duty. Thanks for the advice, ~Anthony