Awjeez- yes chromatics, too. I'd forgotten them. But you'd need them to do the Larry Adler or even Stevie Wonder stuff. So Ithink we're up to about 48. Then again you could include specialist bass ones and long-scale ones, too. Oh, say a couple of hundred ought to cover the various pemutations safely.

But then again if all you want to do is make train noises that might be regarded as overkill.