Chromedome says something to the effect that the Headmasters automatically revert to their vehicle modes without their heads. Why, then, in part 1, were the Autobots standing around headless, while their heads were being converted into exo-suits for the Nebulons? But okay, let's say that this feature engineered after they became Headmasters. This creates a new problem, though. Remember back in "A Decepticon Raider In King Arthur's Court" when Warpath said he was so low on energy, he couldn't stay transformed? Does it still use up energy for the Headmasters to stay transformed, then? What if the Nebulons who form their heads never come back? Would they revert to headless robot modes when they ran low on energy, or just run out 'till they died?