I pulled and relayed the lower rib, [on the third gun I mentioned],yesterday. Sure enough, the factory had missed a couple of spots. These finally started to rust, and that rust had started to move under the solder near it. Even if I could have repaired the loose parts alone, which is doubtful without acid flux, the rest would have continued to fail. It's quite possible that left long enough, that pitting would have thinned the wall between the barrels enough to cause a blowout. The spot worse afflicted was right about where you hold the gun with your left hand, just above the tip of the forend.....
The ribs are now air tight, as proven by immersion in hot water. Now for the clean up and refinish.
Jim
