[jee7s]

Originally Posted by jvriezen

Any ball coming to rest on the truss is also declared dead immediately.

That's potentially problematic. Say this scenario occurs and the new ball is introduced. But, at a later time the ball on the truss then experiences an outside force (another ball, a vibration, a strong breeze) and ceases to be at rest. Then the ball falls onto the floor and there are two balls of that color in play. How do you know which is the legal ball?

I'd say a nice beveled or round plastic cover for the truss that prevents the ball from being at rest on it is a safer bet. It removes the possibility of the second ball being introduced, it's cheap, and it's easy to design.

IMHO, any scenario that results in a second ball being introduced to the field without the existing ball being removed or obviously non-functional (deflated, etc) places too much of a burden on the field personnel and alliance members for tracking which ball is live.