One sees a lot of things if you look at enough guns. I have heard of people putting the Top Lever back to center on guns with a rib extension & cross wedge bolt such as on Bakers & Stevens etc by closing the gap in the extension by hammering the top down.
This should Never Ever be done. It will, of course, put the lever back to center but it will Positively Ensure the barrels are not properly seated. That top part of the extension is there purely to fill up the slot for cosmetic purposes, it should not even touch the top of the wedge bolt. It treats the symptoms, but worsens the problem.
The bolt should be supported on its top by the frame with the lower wedge portion bearing on the lower arm of the rib extension. The wear will occur on the locking portion & is compensated by the lever going left. When the top of the extension is beat down, then the barrels are pulled UP to the bolt, rather than the bolt pulling the barrels down on face.
This fix is somewhat akin to putting sawdust in an oil pan to deaden the sound of a Rod Aknocking.
