Hi Nigel – many thanks.
The K’s casting provides cylinder fronts, which are, of course, visible as there is no footplate in front of the smokebox. I have added the bit beneath it as part of the chassis. I’m at a loss to describe it, a kind of curved V-shape with rivets on the front. The K’s buffer beam will be re-used but I have some nice Gibson sprung buffers to go on it.