Arnie999, I have that exact guitar GM4TA, the TT2 transposes like this:
-5, -4, -2 [0] +2, +3 or B C D [E] F# G
I also have the ZT3 TT3 transposes like this:
-2, -1 [0] +1, +2 or D Eb [E] F F#
For a while I used the ZT3 all the time but eventually the cheap metal that Gibson Steinberger used on...