The Nitro Express.com Double Rifle Forum is way ahead of others on the web IMO.
We now have so many highly experienced members with a broad knowledge on doubles.

I see there was a question recently on another site regarding a Raick Freres double where the poster was seeking information on the maker and despite the huge membership nobody could provide any first hand info.

Now if that question had been asked on this forum the guy would have been able to find out some details on that maker as I know for sure that at least one member here has owned, used and handled double rifles of that make.