Here is a bit more. Photo below, a little out of focus, shows the rear face of the barrels after micro-tigging. The weld on the right barrel has been filed and stoned, the left is still to be done.

In the next photo, both welds are finished and the rim recesses freshed out with the chambering reamer.

The final two photos were taken after I finished filing and stoning the seams between the front of the mono-block and the rear shoulder on the barrels. As you can see, even though the barrels are still in the white, the seams are barely visible. Once things are rust blued, they will be even less so.