Toby, DJ7MGQ wrote: "Are there any issues with the K2KEYMODKT when installing the modification and the software in a pre-3000 serial number K2?" ========== I installed the K2KeyModKt in S/N 2622 with no glitches. It reduced the CW bandwidth (clicks) from +/-1500 Hz to about +/-150 Hz, so it's a very worthwhile mod if you want a much cleaner CW signal. 73, de Earl, K6SE