So yea if you already have luma or a split supply there are much easier ways to do this conversion (I will make soultions for these situations soon). This is meant to be a standalone end point solution that doesnt care what sync you have or anything else,. just doing the math for rgb to ypbpr conversion and pulsing Y -300ish mv on sync. The key here is that this is running off a single 5v supply and not using a rail splitter or a negative rail. Will this work ? Probably. Are there "better" ways to do this ? Also probably. I have finally chosen the op amp I want for this design LMH6722 and will port everything over. 2x LMH6882's could also be used but it's more expensive. I have the ratios figured out but I have to change rf till I can find resistor values that exist.