Just an update on the shelves. On Friday I got all the 2x2x15 braces attached to each bracket. Just need to drill a hole in 40 of them for cable running.
The very top shelf I am using I think 3/8″ Luan plywood. It only need to act as a “sky” so I didn’t go with anything fancy for that level.

Today I then visited Lowe’s and picked up 2 4×8 sheets of 15/32″ specialty plywood. I had them cut it to 6 15″x8′ sheets to limit the number of cut’s I’d need to do at home…. and to fit it all in the car! 8′ just fits in the Mazda 3 5-dr if you ever wondered 

Shaun Previous Layout
Getting close to a pretty set plan now.
Removed the Level 1 yard, angled the Level 2 yard to get away from the constant squared/straight track, and added the straight sections on each level to be used for the removable staging caddies.

Shaun Previous Layout
My order of 2x2x18 wood stakes arrived at Ace today, so I ran over to pick ‘em up as soon I got home from work. Made a little “assembly line” in the garage and in 4 passes cut the tip off all ‘em to make a 2x2x15 wood brace. Each of these will be attached to a shelf bracket, plywood on top, and then 1″ blue foam.

Shaun Previous Layout
Another idea popped into my head while looking at the layout and trying to figure out how to turn trays and simulate thru-trains, etc…
I first thought about using a staging cart. Basically a little I could roll out from under the layout, raise up to level height and roll trains on and off. But figuring out how to raise the tracks that high for level 1 and 2 seemed like a pain. Then the idea of a caddy/tray hit me.
So here’s my thoughts. On level 1 I would remove the yard ladder totally. It’s place I would put 2 arrival/departure tracks simulating the tail end of the yard the train is approaching. Under each track (2 yards and 1 main) I would cut of a 1″ deep channel into the blue foam that will be on top the 1/4″ plywood (or 1/2″ haven’t decided yet). Length would be about 40-50″, width maybe 1″ or 2″. I’ll have to tinker with real stuff to determine that. In each channel I would then place a piece of 1″x?”plywood with track attached.
I now have a removable “staging tray” for trains. This would allow to me turn trains around such as an Amtrak train, and simulate the train entering the yard and leaving layout without having to use up real estate for another yard. One of these is enough for me and the budget, heh.
I would do the same for level 2, just had a straight section behind the refinery for the tray piece to remove trains that are continuing on past the refinery to whereever they are headed.
I really like this idea and it’ll be a snap to implement. Here’s a really crappy drawing I made on a post-it note

Shaun Previous Layout