There was a thread or two on those a few years ago. IIRC they are reportedly solid, but need a good bit of finishing up.
You might try PMing TC1 about them. He might have had one done. If my recollection is faulty, I apologize in advance to both of you!
Yeah, I had Mark Stratton put one together for me years ago. At that time you could still buy rings that were cut for the factory bridges. I bet that's dried up by now. I found an old "guild" barrel that was octagon with a full integral rib and thought the square bridges would make a nice addition. It was bored out to a .338-06. I built the stock on it and am reasonably happy with the results. Doumlin was just one of the names they put on these. They are all the same action though. Not as slick as a FN but maybe a little better than a Charles Daily. I've enjoyed mine.
Terry