I finally got around to updating my K2 Ser. No 1217 to the latest B revision. Everything went in and out just fine and I am quite happy with the results except for one new annoying feature. I hear a key type click or closure of the paddle in my sidetone. It doesn't go out over the air. Does anyone have any ideas on this? Is this now normal with the new sidetone modification? Don Minkoff NK6A K2#1217 K1#844