I am thinking of getting a 5 string fretless and I am wondering whether a 5 string always has to be tuned with a low B. I only play a fretted 4 at the moment and generally believe that I would get more out of adding a higher string on a fretless, not a lower string. If I get a stock 5 string fretless, can I tune it EADGB or EADGC or will I run into a problem with the bridge or nut? I don't suppose the tuning makes any difference for the electronics? Any idea if a lightwave system would be sensitive to string thickness if I go with a lightwave fretless? Thanks.