Dave;
I explained the bolting/breeching system in an earlier post. Apparently you still have no comprehension of it. "Both" the Lefever & Smith are self adjusting in the bolting. The top lever will move left on either as the bolts wear.
The Lefever "CAN" be adjusted for hinge joint wear, the Smith "Cannot". You can call that better engineering for the Smith IF you choose to, I Don't.
I will add that I have two guns with absolutely no wear compensation to either the hinge or bolting. One is a J P Clabrough , the other a J P Sauer & Son. Both are SLNE guns, both are more than 100 years old & both are still tight. It just may well be the case that the friction in a self adjusting wear compensation device creates as much (Or More) wear as it compensates for.
