It took me about a season of birds before I became confident in an R model safety, and, double triggers. I had shot a Ruger Red Label, and really came to despise the barrel selector/safety/wild bird saving device installed in those guns. The previous O/U I had used was a Beretta Silver Snipe, with a non-selective single trigger that worked very well. I was a much younger man during the course of that first Darne safety double trigger year, however. I wonder how long it might take me to do that today? My R15 20 gauge had the funny push-button safety like Bills, but, the R10 I shoot now has the perhaps more familiar to most folks rotating lever.
The Ruger, and the Darne R15 went down the road, but, the Silver Snipe still lives here. The pre-680 series Beretta O/Us are very under rated guns, in my opinion, and under priced, as well.
Selling the R15 was a huge gun trading mistake that I rue to this day.
Have a care package all ready to go for you, BIll-I'll mail it tomorrow.

Best,
Ted