I've completed two NES controller mods that I've seen posted on instructables. Thank you for the inspiration. The NES MAX upgrade which truly does make this the best NES controller I've ever used. The new stick contolled D-pad is the most responsive I've ever seen. I made two of them to have a complete set.
I completed one LED back lit controller just for the fun of it. It came out pretty good but will most likely use the MAX from now on when playing the NES.
My next project will be a bar top NES arcade, also inspired by instructables.