No point sitting and thinking Neil
dive in get it wrong and try again ! As tonights post will show ! Thanks for the comment Rob.
I had a couple of hours in the shed tonight, after comparing the paper plans to what I had got from measuring the Bachmann I realised
a) the OO model is not quite to plan
b) in my enthusiasm I had made a couple of errors the main ones being the shape and position of the triangular access panel and the width left for the cab doors.
So I had to decide now I knew they were there, could I live with them, or forever think I should have done something, in the end I decided to make two new side panels out of thin plasticard and stick them over what was there.
Here is mark 2 with new sides and cab doors. In these pictures, I have placed a scrap piece of card to simulate the headcode board, without it the roof does look to be heigh, but in reality isn't. Other things to to note, axle ends and fuel tank.