Quote Originally Posted by leorcc
I've watched Series 4 A through D now, and I have to say I'm very impressed with the quality. Are all the parts used on the robots pure from Lego or are there some custom parts involved?
No custom parts whatsoever! I wanted the veiwer to know they can do the same without extra hassle. All electronics are official Lego Power Function parts, from transmitters to actuators. Though I did toy with the idea of having paper/cardboard shells/armour...