Hi Alastair, its no problem at all honestly haha...
This kit, yes it is a C14 I think, but it definitely doesn't have inside cylinders, and so far as I know there isn't a kit available for outside cylinders, though I am sure for someone far far more experienced than myself it really wouldn't be any problem to adapt at all.
In fact, whilst I have been building this kit so far, I have been thinking about what could be done with these oh so simple kits in terms of a bit of bashing and scratch building... Outside cylinders, outside frame, possibly even a mallet type engine with a couple of kits and scratch built bunkers and tanks...
Thanks Paul, but I still insist that I am not experienced... The other two wagons really are all i have built. That and around 8 plastic wagons. Can't wait till next week to get some more work done on it, order the wheels, get them on, and pull some of the many wagons that I have built so far. I think I have come to the conclusion that I am definitely a rolling stock fanatic rather than layouts, though maybe that's just because I haven't got the space (or at least the permission) to build what I would like.
I am still hoping to have a rake of brass running in on the test track at the kettering show. Hopefully the die-hard modelers wont mind my rather mixed rake of unpainted stock.
Will post again soon.