My Devcon Steel does a remarkable good job, but does not last forever. Also
a refit is easy to do. The trouble is the underlying underlug which keeps on spreading after a lot of shooting even with reduced loads.
The shim method is very good too, but seems more involved I tried it but prefer the Devcon Steel method.
What really need sto be done is mill off the seat to the spring hole (1/2") and fit a new piece of hard steel with a perfect seat and weld it to the existing underlug. Besides a 1/16" larger hinge pin could be added 7/16 instead of
3/8".
That is what I will do when mine gets loose again.