Hi Paul.
After frying a sound chip whilst fitting it to my 2-10-2. I fell out with it for a while! Over the past few days though I've fitted another chip. I managed to get the small tillig speaker (66051) in the cab by filing the clear plastic sound chamber down a little bit and gluing it to the speaker. I've also been messing around with the sound profiles, I too tried the obvious one 95, 52, 50 and as you say they dont quite have the attack in the exhaust. I did however come across this BR45 ESU profile 92441 this to me sounds spot on with the correct whistle and a really nice coast feature that doesn't chuff again until the power is raised back up again, the only thing missing is the clunk from the Trofimoff valve when the initial steam is admitted to the cylinders but i can live with that! Let me know what you think.
Matt