Hey guys. So we're 2 min. To showtime and I check my tele's tuning... 1/2 step out!!!! So I quickly retune, the curtain gets pulled..... and IM a half tone out! HORROR SHOW! Its like those dreams where you show up for school and you've got no pants.... Anyway SOMEHOW my TU3 got put into Eb mode just minutes before the show.... Anyone know of anyway to lock out that feature?