Another question to this, is I've already farted around with my game and a cheapo video board and realized that the picture gets very washed out when putting a video card in parallel with the CRT.
How did they do it back in the day when there were monitors mounted on top of games so everyone could see, was there some type of video booster device, or just 2 CRTs work fine in parallel (or series somehow) with each other?
Tim