Thank you, Peter!!
Yes, this layout has finally hit a sweet spot where there are many things to do. I can pick and choose what I want to do each day. On the other hand, I am keeping in mind that some tasks need to be done in sequence. Don't put the tender before the engine! 
Once you get the River City gang in to help with the plywood, you will be working on many things besides building kits before you know it.
