The NES RGB mod is done! It was a nightmare, not because of the work, but the docs for the board are, at best, just about passable, and the docs for the replacement power board which has a direct hookup to it are extremely lacking.

I worked out the specifics by watching YouTube videos of people failing or struggling with it, and carefully examining the pictures of the power board from the retailer.

Now it's done though it's producing amazing crystal clear video!