I play against guitars in Drop C. My 6 string basses (Ibanez SRFF806, 35.5"-33.6" and BTB686SC, 35") are both tuned G C G C F Bb. The BTB is strung with Kalium Strings (Gauges: .158 0.118, 0.090, 0.067, 0.049, 0.035). I still have the stock strings on the SR (0.130-0.032) but I have two sets on...