Ok, I am ready to start 4 license plate guitars. I have some boxes ready and the plates. The neck will be for 3 string. The issue here is what pick ups to use. I don't want to cut into any of these plates. It was mentioned that mounting a flat humbucker to the top of the plate is best. I heard some reports about this about poor sound. I also heard the neck mounted piezo was not a great sound either. Can any of you comment on this?

Thanks in advance.