The Y14 tender is now making progress. I've just gone "ping!" with the first 0.6mm drill that I've broken since I purchased my Proxxon drill stand. However that is nothing more than I deserve as at the time I was pushing sideways on it to use it as a mill to cut out the coupling hook slot!
All that to save me digging out the pliers to adjust my piercing saw :-/
Lesson learned, and I've now done it properly. Here's the tender top (refered to by Chris correctly as "a big b*****d piece of brass" with the coal space cut back to the correct size, and the buffer beam in progress.
And this is the old and new buffer beams tack-soldered together to enable me to drill through the coupling hook slot.
And finally the old and new buffer beams separated, cleaned up, and side by side for comparison:
Now back to the soldering iron!