A week ago or so looked into Smoke units and a "cheap" steam sound decoder (under £40)After some thought I took the plunge. The plan was to add smoke and sound to my black crab but after an hour of trying to fit the decoder and smoke unit in the boiler space (the speaker is in the tender) I admitted defeat and left the smoke unit out. Not wanting to whaste it I fitted it to my smaller 6671 loco.
http://www.youtube.com/watch?v=HbCHBeAduEQ
To the trained ear I guess its not the right sound for a crab but to my unknowledgeable ears it makes a steam loco sought of noise !!!
John
RJR