One thing I forgot to pay attention to was the width of the chassis . The class 20 chassis is 31.5mm wide. The ED body measures 30mm internally. Not a major problem, but it would have been easier to deal with before I cut and extended the chassis. So it's off over the valley later to a friend with a milling machine. While I await his return from his mother's I can get on with the body itself. Windows have been cut out and replaced. I can't decide whether to fix the buffer beam to the body or the chassis. I think it may be easier on the body.