Not to answer for Mr. Volfandt, but personally I use the stabilizers to get the weight off the frame and use the bucket, while being cradeled in a dollie, to rotate the BH forward as necessary to release the locks.
At that point, the bucket is in a dollie, the stabilizers are holding the assembly up, and I can ease my tractor forward to clear the subframe.
THEN I put the 1200# dollie under the BH frame and lower the BH frame onto it using the stabilizer controls. I also make sure the boom lock is in place.
When done, I have the bucket in a dollie and the frame on a dollie...8 little wheels total...and I am free to maneuver.
I'm sure his procedure isn't much different...he just pushes up on his dollie and from that point forward the whole thing is pretty immobile. The biggest upside to a one-piece design is just in case you have bleed-down of the dipperstick ram...one-piece isn't a big deal...doing what I do, the whole assembly could fall flat on its face, but I've had it off the tractor for 2 weeks once and it was fine. Biggest problem was bleed-down of the stabilizers...they start sliding down a little and increase the assembly's 'girth'. Nothing a stout bungie couldn't fix.