I take your point - but I'm sure some of the technology could be applied to DRs as well. For example, Fabbri offer stainless barrels as an option; the barrels are blacked using a diamond powder coating and specially designed vacuum process (so I'm told - don't know how common this is); in their over-unders they do not use side ribs - they are made from solid with a crosspiece forming an H-frame carrier along their entire length, which is in turn machined for precise weight distribution and adjusting the point of impact; and they use lasers to fuse the rib and demi-bloc tubes to avoid heat distortion and end up with one piece of stainless steel... All in all they seem to be pushing at some boundaries.... if they were rifle builders, you can bet they might come up with some interesting ideas too! None of which would come cheap though!!!