As Eventorizon points out, I'm talking about an option for just a plastic or metal chassis / baseplate, not a metal framework / superstructure to which is affixed timber armouring, so not a contradiction as I see it. Having a tough and resilient chassis / base plate is helpful with a heavy bot, I cannot see how a quick pre-fight inspection cannot easily establish that a non wooden superstructure / framework is in place.

Hoppy