Ditto on Si's Left-Handed switch.
Sharp and without a section to straighten trains (at least one full car length) in S curves cause derailments.
Your second plan looks better.
Spray insulation is great.
Make sure that you tape of ALL track. You can't undo that stuff when it gets on the track, don't ask how I know.
I use a combination of blue or pink styrofoam insulation board with the spray foam.
It builds up rapidly that way.
Once dry all of it shapes with a serrated knife and a rasp.
Then I coat over with inexpensive drywall joint compound with a little bit of paint mixed in (for chipping insurance).
You can use the boards for your dividers too,
just paint a white primer over them,
then you can paint whatever you want on them.
____________________ Steven B.
Humboldt & Toiyabe Rwy
Now I have a plan for a Small layout, because I am bored and like the idea of making a "Micro Layout" in On30.
This plan Revolves around Porters and Small Diesels and my somewhat liquor induced idea and SCARM.
It is 4x4 layout and I kind of want to see how unorthodoxly small I can go in On30.
This plan may look like it has close clearances on track, and it does, but it is a guideline.
The smallest radius I have is 15-14ish.
I am going to remove that switch on the bottom right and move flex track to a more clear area.
Small ore or logging cars will make up most of it.
It is a nice plan.
Two thoughts, if you stay with 15" more equipment will work on it.
For instance the 4-4-0 American will choke right below 15".
Mine hangs just slightly going through a 14 7/8" spot.
It doesn't stop, but you can see, it just barely hesitate,
and if you are really going to use just Porters and small diesels, you can go much smaller.
I've just started a 2' by 4' plan for them.
The 0-4-2 Porter will run on 12" easily and with a little tuning on 9".
The 0-4-0 Porter and the Davenport will run on 9" and usually even 6".
Most small (18' and under) freight equipment will run on 12" and many will run on 9" or even 6".