we used to hook up a six way switch to a single cap and one bypass section and let the customer try it out. we labeled each one something different. in the end we gave the customer exactly what he wanted. but we always got a customer profile before we started.a jazzy player had one set of option and the guitar and pickups played a huge part as well. in the end we did more math and then handed the customer what we thought he would like. however if he didn't like any of them we would try something else. but we only had that happen once in five years. oh and btw i had a guy come in with a 10,000 dollar guitar from prs that he had to have paper and oil caps in he just had to have them.. so i had rolled him a set for 50 bucks. he said they were the best he had ever heard. i smiled said thank you and showed my business partner the sweep on the scope and we had a good laugh and i bought him a steak with that money.