Since the Primes shown in "Robot Heaven" are only slightly different to The Fallen wouldn't it be easy to make some pieces to allow a Voyager The Fallen to be turned into one of the other Original Primes shown in ROTF. There is CGI reference for them too I've seen it. It might be a good way to make interesting use of one of the 4 different coloured version the Fallen toy has. (Burning,Burning Clear, Dark Green and the Teal&Purple). Is it something worth doing even if it's just something subtle like a new head or hands ?