I'm sure you 'tank-types' will laugh at my simple question (but all I know about tanks is that the Italian tanks had 3 reverse gears...in case the enemy attacked from the rear). But my question is this: in this linked Bovington video it states that every hour of Tiger run-time required 10 hours of maintenance (...its now 200 hours). How did that work when these tanks were deployed in battle? Did they run each tank for an hour then stop? Did they always have 9 spare tanks ready to keep up the pressure? How big was the maintenance team? Which bits wore out?