I know you're probably tired of hearing from me but if you're changing your pots out you're going to have to remove all the wires and caps first. That being the case you might just as well replace both. You had mentioned the AFD set up. Slash likes orange drop caps. I would use .022. CTS or any premium grade 500K audio taper pots will do. If you just want to try changing the caps themselves, all you need is a soldering iron. It only takes a few minutes.