I too have a PDX -12 as my snare with a Crimson Module, and had to dial it in a little, it does not have all the settings the DM-10 has so I tried this.
I lowered the retrig to 1 and the sensitivity to 7, the threshold is at 5 and crosstalk to 5.
It seems to trigger well for me now with those settings, however I keep the head pretty tight.