John that is fantastic work. I love the Bullhead panel and the track bed. The flat bottom rail is beautiful work the soldering is so tidy. I've hit a brick wall trying to source a check gauge for 21mm myself at the moment the scalefour stores seem to not have them in stock. I'm in the same situation myself regarding starting a build. I'm going to have a purpose built railway room built. When it's built is thrown up in the air at the moment. This thread will keep me 100% focused and I can't wait to see more, especially the flat bottom track.
Please keep us posted,
Rich,