'Morning Dick,
Glad to hear you are still putting that gun to good use. That was the only example of the double/single trigger I ever ordered or sold. Nice option, for sure.
I was only able to talk the Bruchet's into building three R11s-your's, my friend Bill's 16, that was reviewed in Shooting Sportsman, and Steve Bodio's slug gun. They wanted to build higher end guns.
Like riding a bike, once you see how a Darne opens, you will always be able to do it.

Best,
Ted