I tried using a few of the diatonic shifter. My song is in the scale of D Major and the main lead is in D minor pentagon if scale. I set the preset accordingly, My problem is that the shifting is inconsistent. Certain notes don't get shifted at all, and bends don't appear to shift properly. Help appreciated.
Have you played around with different scales (perhaps just D min)? Also make sure that the quantization is turned down to 0. If it's up, your bends will not work.
Also, what specific preset(s) are you trying?