I recently had.my J-45 professionally setup.The action was to high. The luthier lowered it. The now the high e and low e are both set at 2mm at the 12th fret. When I tune it a half step down, the bottom 2 notes(high e and b)seem to sound different now. Like a mettalic twang almost. There's no fret buzz. Is this normal? Next question, will a 14 radius saddle work for a 12 radius saddle? I'm a lefty so my choices are limited. Appreciate any input or experiences.