Started playing with a blues band recently, learned their tunes only to get an email just before the gig explaining that on live gigs the guitar player was detuning 1/2 step to "concert E flat" I play an F-Bass BN6 so I just dropped a half step on the fretboard, fine except for some of the tunes that he plays in the "new" E. Question is-- is it going to be in any way harmful to my bass to go ahead and detune a half step to make it a little easier to play in the new "E" ?