After a small bit of research, I see that the head is piezo while the rim is a switch. Really liking the feel of this head but it's only being seen as a single zone with standard settings. Is there a workaround to get the rim to trigger properly even though it's a switch? Through a splitter and an additional input, or something else. Worth upgrading to a newer Alesis unit that has this functionality? I haven't dove into the pearl redbox manual to see what I can find since that's just a DM10 clone anyways. Might even just tape a piezo to the shell if that would work...
Have tried changing the Rim Trigger Type from Piezo to switch?
InputType: Select the type of trigger you have connected to the input.
Select "PIEZO" for triggers like pads or cymbals.
Select "SWITCH" if you are using a drum pad with a rim switch, a cymbal with an edge switch, or a footswitch.
(Note: This parameter is only seen on certain pages.)
DM10 User Guide Pg 24