I have a B1 kit in the cupboard Mick, so I shall follow with interest... We've done this before haven't we!
Tony
Like all physics, hot air doesn't scale. On the other hand, since I was at school all the physics I learned is wrong.....Will the cylinder drain cocks work? Just needs a servo on the DCC thingy and they could open just as the engine moves off, then close after a few turns.
Just a thought...
Tim