Darryl,
In the full knowledge I would probably be your only customer I'll throw this request into the pot. It would have to be straightforward for you to include though.
What about 30-line colour, supplied in simple R, G, B with a separate feed of syncs?
Getting rather tired of the current programme content consisting of Mickey Mouse, Noddy - and a 'Daz' packet for the commercial!
Happy Christmas
Steve