Pretty cool solution for a river/canyon terrain piece.

[Andym]

Well, aren't you Mr The Glass is Half Empty today!

I'm just trying to save the tootsies(toes) of my fellow gamers! We're such a physical bunch, I don't want to see anyone's athletic career down the tubes!

......and I think you'll find it's the river that's half empty, not the glass.

Easily prevented just by running a couple of straps around the neighbouring legs of each of the tables so that they can't be moved apart.

Sorted! That's a great idea!

You could really expand on that river idea. Anything from Grand Canyon style depressions to a cliff that leads from the floor up to bunkers on the top of the table for a Guns of Naverone type game!

[Vagabond]

I'm just trying to save the tootsies(toes) of my fellow gamers! We're such a physical bunch, I don't want to see anyone's athletic career down the tubes!

We are wargames I don't think we have an athletic career.  

I think it looks good and solves a lot of issues.

[Umpapa]

My simillar idea 3 years old:

http://umpapas.blogspot.com/2014/09/15-mm-canyon-kanion.html