When installing a GTX345 and the Altitude encoder (Garmin GAE 12) that fastens to the rear of the GTX345. If the area behind the panel my RV9A is not drafty or pressurized is it necessary to connect the GAE 12 to the Static lines? Or could you just leave it's orifice open and/or filtered? "Memory from the old Steam Gauge Simpler days says: "If Static system is clogged just break the Glass on the VSI and you will have Static pressure and Altimeter again". Maybe showing my age, but Is there a real difference? Ed S.