Very interesting, sort of a vertical "double rifle", LOL!
Going to check out their sight for info on "timing" the barrels. I checked out a European manufacter several years ago, as they could build and adjust timing as to your specifications. Small Belgium company, but can not remember the name right now. Remember they built their shotguns on on same design as their heavy rifles. Had a good reputation, and seemed very willing to work with you in correspondence. Always thought would get a chance to visit them, but never did. Do remember it was going to run into the 6 to 8 thousand dollar range, depending on what specifications I determined as final. This may be the same outfit, as they produced firearms under several names for "custom" shops and also sold their actions and "proof-tested" barrels. Should recognize if them when I review their info.
