Hi
Sorting out what a customer wants is all part of the service from any builder. Some people have a fairly good idea of what they want woods/body shape/pickups etc. others have a few parts sorted out and are open to suggestions with regard to the rest. However they pretty much all change over the course of discussing the final spec. I enjoy the whole process as I can put in my suggestions and pick up a few more for the next time as people come up with ideas which I might not have. It does not matter how much or how little info you have to start off with you should get any help you need to sort out your bass.
Cheers
Alan