Thought I'd relate my experience from Friday. I'm a newbie with about 40 hours M6800 seat time, I've got to get that out of the way first.
I found a good deal on a HD 8' mower, that apparently weighs just over a ton. (2035lbs), Brought my M6800HDF, R4 tires (not filled), and attempted to pick it up and immediately found my front tires about a foot off the ground. It's an experience trying to drive with the front end in the air, trying to steer with the rear brakes.
Tried for a while to get it loaded up on a trailer, but I ended up not bringing it home with me.
It would pull it around just fine, and it had the strength to lift it, but I wish I had purchased a FEL or something to counter all that weight back there when you need to lift it.
Weight seems to be a large consideration with a 3pt lift style, to me.
I should probably start another thread and ask for advice. It may be the problem was just me and inexperience.
fwiw,
Brad