Hi Gary
Thanks for the comments what a brilliant idea in the back of my mind i new multiples could be fitted but had completely forgot about it. I would have to look into how multiples fit together but it would be a cheap and easy way to improve performance. Being new to steam can I ask why a second engine would make it self starting
Regards Mick

Hi Gary
Sat and thought about the question I asked is it because there is always one piston over the steam port
Regards Mick