
Very Nice.! I'm sure many here will be immediately repatriated to childhood desires, with one look at your setup.
Are those tracks made of brass? A member here (Tiggr), who's not been only lately, configured his garden with tunnels, and halts (platforms) specifically for Tanks and Trains.
Here's a started thread on the topic, but search out his own contributions
viewtopic.php?f=26&t=27029&p=258444&hilit=tiggr#p258444
Also Jackalope, a mod and notable tank enhancer here, drives, or did drive (?), Locos.

The BIG ones with mega horsepower...
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.