Just wondering how many would be interested in this, perhaps the people who write MadMapper?
I've long wanted for my church projector setup to have advanced colour correction because of mismatched projectors in the setup, not just mismatched models which we have but differences in the same model projectors as part of the set (Also they are quite dim in a lit environment so they need gamma boosted to get any visual differentiation in the lower RGB range). After reading a forum post that stated that editing the quad etc. FX was "not documented" I figured it might be possible and indeed it is

I added gamma correction to the colour controls as well as colour "curves", well really a jagged line with points at every 10% brightness level with linear interpolation - I figured I'd leave bezier curves till it was necessary.
My next step is to implement brightness or gamma changes between the sides of the screen, as these projectors don't output uniform brightness.
Here's what my initial version looks like control wise (default values):
Here's after playing with the settings to create some weird effects:
If people are interested I'll post a YouTube video of it in action

Any feedback, ideas or just encouragement would be great! I plan on releasing the code once it's cleaned up a bit and well commented, perhaps with some extra features.