Hey, This is DC Phillips bassist from Magg Dylan in Virginia Beach My guitarist needed a bass player to play a five string bass with the " B " string tuned down to a "G#". He also needed the string configuration to be as follows, ; at least the first 4 strings: G# D# G# C#. Some of you probably know of people who have attempted this, but have they been successful with our screwing up the neck? Weird? Highly unlikely that would work? YES to both, but I found a way. first, this can only be done with an over-length bass. I'm using an Epiphone Thunderbird. i talked to my guitar tech, and said it is theoretically possible but not to take a chance on an expensive bass; that's why an Epiphone was used and not a Gibson. He recommended to use the highest gauge "B" string set so that it would give maximum range and with minimum wobble and sloppiness. So we used Ernie Ball Power Slinky Bass 5 strings. Gauges 135, 105. 85, 70. He re-cut the nut, obviously,adjusted the neck and action, and it plays like butter. Bassist Bryan Beller did this to his Gibson thunderbird but used a 130 gauge and tyned it to "C" So you do not have to alter your playing a bass to a 5 string just because you want that lower bass end. Any questions, please respond to this thread.