A large layout with MANY switches would be a challenge to one's memory for remembering which controller to throw to change the route of a switch. My L-shaped layout has only 11 switches; but at age 81, my memory for switches and numbers has limits!
I considered installing Lionel SC-2 units for switch control with a CAB-1, but I like the vintage look and feel of switch controllers. Here's my method for ID numbers and switch control:
1) I placed an ID number at each switch using ID tags from the local Tractor Supply Store. The original purpose of those yellow tags was for use as ear tags for livestock; I apologize to the bovines. I wanted a tag big enough to show the stick-on number from across the train room. I realize that other hobbyists may want to blend the switch ID number into the layout somehow, but I wanted/needed a 1/2-inch number for clear reading.
2) I mounted each ID tag on a small L-bracket painted it black and installed it at the appropriate switch - near the diverging route.
3) I installed the vintage-style track controllers on a pull-out drawer at the control center located at the angle of the "L" of the layout. I attached an ID number on each controller for reference. The pull-out drawer slides back under the layout platform when not needed for switch control and some other features. I use Lionel TMCC with a CAB-1 for control of the trains and sound effects. There's a line of sight view from the control center to all switches. One switch (to a storage siding) is manual; no RC controller needed for it.
4) All my switches are K-Line O42; most of them of the low-profile style with anti-derail built-in. Bullet-proof!
5) Some pix attached for reference.
6) THE LION ROARS magazine of the LCCA published an article about my method. A link to that article is attached for reference.
Mike Mottler LCCA 12394
mottlermike10@gmail.com