After reading various threads on the forum, I came to the conclusion that the £9.75 Argos 3 way scart control box, catalogue number 534/2361 here had all the inputs and outputs fully RGB wired. I bought one today, but upon getting it home, noted that only one of the input sockets was labelled as rgb. The box contains no paperwork or instructions at all, but there is a part number 18205ARG on the back. Googling scart 18205arg finds the following pdf http://www.philex.com/technical/downloads/av/18205.pdf which again labels only one of the input sockets as RGB. A bit more searching came across what looks to be the same unit at http://www.beststuff.co.uk/av_hubs_and_splitters.htm called a "Select Scart Switch Box" for £14.50. Here is specifically says "One RGB socket". Guess I need to take it back and get the similar looking Hama one from beststuff. I presume none of the other manual switch boxes from Argos are fully RGB?