To the best of my knowledge, the "dremel approach," in regulation, was, as Sabatti admitted, a huge mistake, an early ONE TIME thing, done, admittedly by one of the Sabatti Company owners in a European interview in which he further said that they would never repeat that mistake again, as it is too damaging to their reputation. Mr. Sabatti, in explaining what happened, said that the firm received a surprisingly large order of double rifles (obviously from U.S. Florida importer for Cabelas) in one of its early orders to supply Cablas, the sole U.S. Sabatti dealer. This huge order had to be completed by a designated date, so Sabatti cut production corners in order to fill that order on time. They resorted to the "dremel regulation approach," as you indicated, an abomination for sure! Now, due to demands by Cabelas, and due to Sabatti's reputation problems, they no longer do such abominations, but they regulate the barrels as they should be regulated. Personally, I own three of their rifles, in different calibers, a .500 NE, a .470, and a recent purchase, in a .450/.400, all with no "dremel approach" regulation, and all shooting very well. The .470 is an ejector,while the other two are extractor. I have done some custom, mostly cosmetic, work on them all, to bring them up to my full satisfaction. I have carefully examined all three of these rifles, having taken them all apart and put them all back together again (I have been through gunsmithing school, and have taken Ellis Brown's class in converting double shotguns to double rifles too, in MN gunsmithing school, prior to his writing book on same subject, and I have converted a number of such guns as well). This Sabatti rifle model is a very well designed, very well made double rifle, using the finest alloy steels available; is well worth many times the price.