Howdy Michael, of course the "lazy susan" will work!
My little TT's are just 9" long so what I used works fine.
I do have pit rails and support wheels riding on them so there is no rocking when a loco runs on the table.
You may need them but then the "susan" is larger than mine and it may not need the end to end support.
My tables have "locking devices" which hold the table in position when running on or off.
The pieces for a "locking device"made from sq brass tubing.
And here it is locked, holding the rails in position.
Years ago, I saw a real thing like this on a now long gone tourist railroad.
I thought you'd be interested.
____________________ It doesn't matter if you win or lose, its' how you rig the game.