Okay....a quick review.
This thing works great - I am very impressed. My tractor is only 21hp and it did not even bog down at all. I ran some pretty big stuff through it too - some green and some brown - really no difference at all. I would guess that the biggest I ran through was 4" with no difficulty at all - but I am not chipping anything that hard. My woods are mostly maples and birch plus some scrub trees which is mostly what I am chipping. I did chip some red maple branches - no problem at all. The birch are a brown birch that is pretty hard - chipped with no problem.
The input chute is short and the inside opening seems to be fairly large so I did not have too much trouble with curved branches. You do need to make sure there are no Y's over say 4-5"s but other than that, it accepts wood pretty easily.
One issue with the hand fed chippers is the vibration on the hands. The DR. works pretty well with gravity especially with larger stuff - so you just need to hold it from falling out. The little stuff requires a little pressure and there is definitely hand vibration but nothing too bad.
I got the lower priced of the 3ph models...the one without the discharge chute. I just could not see the extra expense for that metal tube. Most of my chipping will be done right where I want to leave the chips - or I will use the loader to move them. I may attempt to add a custom chute - looks to me like it would be pretty easy to do.
The spread on the 3ph pins is smaller than normal - this would not fit my harbor freight quick hitch (yet. modifications will be made).
Ordering was a breeze and as I mentioned above, it arrived in just three business days which is very impressive. I did the shipping depot method (free right now) but they will also deliver to your driveway for $50 more. There was minor assembly required (Attaching the chutes plus drive shaft).
Below are some pictures. The one with the chips is showing chips from all brown wood - which it tends to chip a little smaller. The chips from green wood are a little larger.
I should also mention that the color is perfect too!!!