Yeah, the MDX is pretty comfortable -- I feel bad throwing chainsaws and gear in the back, and climbing in there with work clothes and dirty boots, but that's why I bought winter mats all around! So far it's been great and tows well.
My Kubota dealer sold me the trailer (and is watching my spending spree with humor -- I'm already asking about a post hole digger,
chipper, and land plane). For tying down the tractor, he recommended chains to the rear drawbar shackle, a chain through the FEL cross-tube, and then a strap for the box blade. I have at least enough gear to do twice that, and will experiment to see how it goes.
I have done some calculations so I can ballpark tongue weight, and there's enough fore/aft room on the 16 footer to give me a lot of leeway.
My remaining concern is how the back of the trailer may dip when I drive on, and if that will lift the back of the vehicle too much. I'm working on some math for that right now -- looks like worst case the loading will give me -1358 lbs of tongue weight. The MDX rear axle carries about 1850 lbs empty, and there will be some push back from the front springs when the rear lifts, so at least I won't lift the back axle off the ground. But I want to think this through carefully.
I plan to chock vehicle and trailer tires when loading. If there is too much movement, I may have some stabilizer jacks welded to the back of the trailer, or even have braces welded to the tailgate (like I would have gotten with equipment hauler ramps). For now, I have some landscape timbers I can stack under the trailer if needed. If anyone has input on this stuff, I am all ears!