I am in the process of fixing "improvements" the previous owner made to a 4x12 cab and am looking for some pointers. Almost all the screws are of mismatched type or completely stripped so that's first off to fix but more importantly I want to know which screws are holding the back piece of wood together. I want to get in and make sure it is not wired wrong but I'm not looking to rip apart the tolex to do so. There are no obvious screws to go at since none of them match and if I can avoid removing everything to try to figure it out I'd like to. Also, if I do end up replacing the tolex (someone did some spraypainting on it and I'm not so sure I can cover it nicely) anyone have any good how-to's for the process?