Hi Jim
Excellent bit of work. One word of advice, did you make notes on how you constructed everything?
I never did and when I came back some of my started projects I struggled to remember how I had built parts of them. When building a number of the same type of wagon I try to build them at the same time to try and keep the parts to a similar standard though this isn't always possible. My rake of eight Anhydrous tankers for example has taken about four years so far and I have completed four of the wagons, the other four are in various stages which does allow me to remind myself of how they were constructed.
You may find scratchbuilding becomes addictive.
Cheers
Paul