Control Line Precision Aerobatics (stunters) have been doing it forever.

Symmetrical airfoils do this extremely well. When I was flying competition stunt long ago it was at a level where most guys designed their airplanes, and almost all of them did it.

When I started flying RC gliders and playing with airfoils on my own designs, I discovered that almost all the guys who drew up their own wings were doing it too. I'd say that it was something almost everyone did who had advanced to drawing their own airplanes. Matter of fact, if you read almost any book on model airfoils, there is probably mention of it. And there will be a good probability that the airfoils listed will include pairs that were designed to have one at the root and the other be the tip.

I have a couple of buddies who fly RC precision who said they thought most of those designs employ it. They don't do their own building but were familiar with it. I got a few IMAC buddies that think the ARFs they bought have it. Don't know any IMAC guys who build their own, much less draw their own.

It works.