Merkels are great guns and of there higher grade guns they had solid attention to detail. This is a stout action and should sound very solid upon opening and closing, that means no ringing pinging or dinging when the top lever closes. The barrels should come down with slight friction not just fall to the drop. The top lever doesn't need to be "slightly to the right" for a "tight gun" I've seen guns the folks beat a burr up with a hammer on your locking surfaces to falsely get tight guns, top levers should stop softly not slap shut tight.

Hope this helps some you

Andrew