I installed one of those EMV-1200 units a few years ago when I flew my
first GPS (that is, non-photo) contest. I'd read about it here on RAS
and ordered it from Allied.

It went in really easy (I just pegged the wires down under the
appropriate screws on the panel terminal strip), works good, and looks
good. I'll get another for my next glider.
Bob K.
http://www.hpaircraft.com