People have been telling me for ages to drop tune at least one of my guitars instead of using pitch shifters on my Boss GT-10. So, I slapped a set of 10-46's on my 1990 Warrior, and switched from E to D, occasionally tightening the spring screws. Suffice to say, the GT-10's tuner can't hack it, so I tuned by ear. Then I switched the GT's pitch shifter off. I have found some improvement to my sound and in the factory patches. I have something to be happy about..