I am running short of panel holes and would like to place an E.I. CGR-30P where the Nav 2 CDI currently resides. I seem to recall seeing on some panels where a single CDI was switched to two Navs. Is this possible? Nav 1 is a GNS 430, Nav 2 will be a KX 125 (replacing the 250XL) with a KN 55 g/s receiver. CDI is a Garmin 106A.