Permanent x-axis invert - Gamecube controller

[bunnywich]

I would like to permanently invert the x-axis (left, right) of the "C" stick on a Gamecube controller (this particular one is "Gamestop" brand, but is very similar to the "Nintendo" brand controller.) Unfortunately, I have no clue how to go about doing so. I do, however, know how to solder and can follow a diagram.

Any help would be MUCH appreciated!

[ToastBucket]

pop it open, find out which trace goes to + and which goes to - and on the little ribbon cable thing that attaches the stick to the main board, cut and flip those two wires.

[gamer255]

If you Pm me I can make a diagram tomorrow after school.
And maybe include some picture of the actual process.