building trailer for bike from car dolly

[pur pony]

Anyone ever build a trailer for a motorcycle from a car dolly? I just bought a motorhome from a close friend and it came with a car dolly. Since i already have a vehicle setup for flat towing, and already have an open and enclosed car trailer, i dont ever plan on using the dolly. I was thinking though, why not build a nice 2 place bike trailer from it so I can pull the bike behind the motorhome from time to time... anyone build one, any pics?

thanks