Hi, Joe, You wrote: "... and am almost done with the RF board crystals except that I've lost the instruction sheet that came with them and don't know which two crystals other than X7 to X11 get replaced. Any hints?" ========== The new set of matched xtals are for X5 thru X11 on the RF board. So the other two you need to replace are X5 and X6. 73, de Earl, K6SE