I have just discovered this again and have spent over an hour watching the videos.
What a truly amazing railway! The amount of work and time, not to mention the expense of constructing this in '0' gauges is beyond belief.
It must be fairly unique in that I doubt that there can be many model railways around, especially in '0' gauge that are quite as extensive as this.
To say 'well done' Roy seems totally inadequate but I will say it anyway and congratulate you for the very many thousands of hours you must have spent building this railway.