hi im not a collector of rotf items, so i just saw this add on kit from fansproject coming soon. what exacly is it? i see 2 add on boxes sold separately. so i would have to buy both sets a and b to make the upgrade bruticus? so if i do this would i have to take a few pieces off the original rotf bruticus to put on the new add on parts? or would everything on the original robot stay intact with the add on parts? i would hate to waste some parts off the original design to put on some replacement parts. so to make the full bruticus upgrade. it will be 150.00 to form one robot?????