With any rotary switch, you run into the problem of getting it through the F-hole. They don't tend to be that compact. Whilst you can just about get a full-sized pot through the hole ( I just tried and it really was a struggle, and you'd need to be very careful with how your wiring went on the pot), anything the same diameter as that with a deeper body, or just a larger diameter, is likely to be impossible. Mini pots are the best choice here for ease of getting your harness in and out.