I should not to have to regulate a new double. The factory regulated the new barrels with a laser, not by shooting. I had to assemble the barrels on the action for the first time. How do I know that? well, the barrel hooks wouldn't fit into the action. A small judicious effort with a jewelry file was necessary to put the gun together. I know the gun had never been fired.

Oh yeah, the floating breach can be removed easily. Just be damn sure you don't toggle the lever accidentally. The breach block can and will fall out. V. embarrassing!