Hi Greg,
I also use a furniture dolly from Menards, but I cut out a "bed" for mine out of 3/4" plywood. I cut it with an extention in the rear to support an old jack stand for the rear of the tiller to rest. When I bought my 430 the tiller was mounted on the tractor so I when I removed it I had a very humbling experience with the tiller rolling. Fortunately I still have all my toes! I learned real fast about blocking the rear of the tiller.