The bone works!
Don't do what my one boss did. We were in a construction company shop where the cat scars on the floor stopped regular metal creeper wheels dead. He got tired of returing lost shopping carts abandoned on the property and decided to adapt the steering wheels from two to his creeper. Worked great on construction stuff 'cept he failed to re-inforce the wooden side rails on his creeper and his fat but caused it to collapse...the bone is built to use the big wheels.
My neighbor is a technician and he doesn't like his cause it was always being borrowed...