You want the receptacle the tool plugs into to trigger the CT. Call the service department, make sure you get a double wipe receptacle. That is what comes stock on the 26 and 36.
Hey bud, good info. I asked when I ordered mine recently. They ( Festool) told me they up graded the design and the device will work on either. When I got my replacement, it was very nice. Lot different then the original.