The shifter seems in fine shape, and I'm reluctant to take it apart to swap a cable. Just sliding housing off/on the existing cable seemed a much more manageable job.

If I start taking screws out of the grip shifter to open it up, will it be easy/obvious how to replace the cable? Or will springs and gadgets and tensioned doodads explode out so I'll never be able to figure out how to get it back together again?