Not replacing the ref crystal in the Maxtrac, just locking it to an external source. The freq is uP controlled VIA RSS. I am just looking for a clean method to attatch my two leads too. One is the D.C. TUNE line the other is the 14.4mhz ref to the lock board. I have Jupiter GPS and Versatile 2 lock boards. Bought em cheap years ago. I know where and how to interface too. Just want it clean. Was hoping someone has documented this already and is willing to share the info