Dave,
I just finished looking at this thread. Wow! 
Very impressive work and it's obvious to me that your skills are definitely improving as time goes by. 
There are many great scenes in your work, but I was particularly struck by:
- The use of that HO train in gorge - nice forced perspective!
- I really like that steel mill backdrop and how you blended it into the scene
- Your city street scenes are very realistic
- That farm! Again, the use of the backdrop and its relationship to the foreground is terrific.
- The rock formation are very, very good. Lots of detail and vegetation make it look realistic
- The river gully between tracks is just outstanding. I love that.
As to "do-overs", it happens to all of us. Don't worry about it. It's your own satisfaction that matters. That's the great thing about this hobby, if we don't like something we can tear it out and do it over.
Keep up the good work, man!
George
