Thank you, Richard, David, Dave C, Bill, John, Michael!!!
David, you told me the snowbirds would be tricky because the tabs are so short. I don't know why they made them so short, but I got the knack of it as I progressed. There are 57 of them on my model.
Dave, you are so right. Once a layout reaches a certain point, You can pick and choose what you want to work on any particular day or do a few odd jobs too. I forgot to mention, I pulled an engine off the shelf and ran it for a while as well.
John, as David and I mentioned, those snowbirds are stinkers. I have some left over, but it will be a while (if ever) before I put them on another building. 
I want to add that pulling the DCS remote housing apart to change out the thumbwheel was a trick! I followed Barry's suggestions in his book. He said you need patience, and that is for sure. It was quite painful too. 
I was thinking, why do they even need the one screw in the battery compartment, the plastic tabs really hold. I know, I should go WIFI and use the phone or a tablet.
Many thanks to everyone!!
