Gwdriver16 you sir are a star! A but a 37 TTS chip in my oldest Bachmann 37 (8pin) yesterday and it was awful low end, really judgering. Did the CV 150 to 1 as I'd already seen and I'd say it was better but in no way workable. Followed your instructions to the letter this evning and it runs brilliantly now. Actually ran it alongside another 37 I have with ESU SWD chip to see how they compare. Ok not in the same league when it comes to horns, brake and flange squeel, but the price is fantastic. What I do like about the Hornby chip is the basic engine and thrash. Mixed in with the rest of my much more expensive sound chips these Hornby ones are holding their own. Done one 37 (of 6), one 50 (of 4) and all the HSTs now (3). The Hornby ones have freed up enough chips to reblow the SWD ones to finish the rest of my fleet off I reckon. Thnk you very much.