OK, after some poking around I have answered the easy questions. But I have one left with no answer. The older CX2 shipped with a 4in1. The newer version ships with a 3in1 and a separate receiver. When I go to the parts listings at several of the CX2 parts suppliers, I find a choice of either a 3in1 or 4in1, but I don't see any listing for a receiver. Any idea what's up with that? I mean, ya gotta have a receiver!

solo