The Losmandy Spider Dolly is the most portable professional dolly on the market. Combined with a piece of FlexTrak, the simple 4-Leg Spider converts your tripod into an inexpensive, extremely portable, tracking dolly. Add a fourth leg, and you can further accessorize it, as pictured here, to be a fully rideable dolly with adjustable center column, foot platforms, and pushbar. Three small cases allow it to be checked through as luggage on an airline.

Also, the Spider, when combined with floor wheels and the LWT Tripod, creates an easy and safe way to position heavy cameras and jib arms.