Joe,
I would not call it final. I would build it with the two reverse loops for the SS track and open up the narrow table for buildings and such. One or two SS switches would do it. Check eBay and NicholasSmithTrains also.
We also need to confirm the tight fit of the two circles on the ends.
Lionel O is displayed for track type. In the lower left corner the detail of a selected displays the part number, in this case FasTrack.
The will also be a little creativity needed to fit the SS, as you can see.
I really think that the reverse loops on the inner are the way to go.
Good luck on the cargo movement and I wish you safe travels.
We'll talk on the other side.
Best Regards,