Sorry to mislead. My blue King has yet to arrive. My comment was based on the NRM King. Incidentally, the instruction sheet for "Cock o' the North" swam to the surface and there is no facility that I can see for adjusting exhaust beats. I was doing a comparison of "Cock" before and after. It chuffs at a constant rate up to speed step 21, then suddenly quickens. Veering a little OT, I dare say "Cock" has cost me as much as if Hornby had done it properly in the first place. It has a replacement motor and a replacement sound decoder waiting. As you may have gathered, I don't like exhaust sounds which don't reflect what the wheels are doing, so sounds of slipping when the locomotive obviously isn't slipping are a no-no. I discussed this with Jeremy at Digitrains and I have ended up with an A4 chip which I shall re-synchronise.