Yoder Mark 1
Explosive Ordnance Disposal Robot - Very Low Cost   Mark 1

Gregg Podnar - H. Ben Brown

  With 30 lb. [14kg] Payload

A steel plate as a payload on top of the vehicle almost doubles it's weight. 
Climbing performance is reduced.

20060509 - Videos with Payload

Doors with Payload

Hill Climb with Payload

Belgian Block with Payload