Norman, I had the same problem you do. It was very heavy for the existing vacuum cleaner wheels. The main problem was the location of the wheels. There wasn't enough clearance under the barrel for rolling well on grass, and the handle was located too far aft -- when leaned over enough to clear the wheels, a large proportion of the weight was on the hands. Also the handle was low, so you basically ended up stooped pulling a lot of weight and snagging on things.
Now, I think wheels can be a good idea, but it just has to be proportioned differently than it was as a vacuum cleaner. 3 or 4 wheels would work, for instance. Or even a moving truck would work with a furnace with no wheels, because the proportions are correct on the truck.
On mine, I finally opted for skids, and that has worked well for infrequent moves on grass.
Looking forward to reading about your progress!!
