We used to tighten up the latch area so that the latch stayed out of the way of the handles/blade.
Take a couple of small pieces of a good rubber if you can find some,and place them on each side of the latch handle.Make sure the latch is pointing straight out.Don't pound too hard with the hammer,but lightly pound both sides of the latch handle right where the pin is for the latch.
When properly done,the latch won't move past the two corners of the handle by itself.The only way to move it will be by hand.
Be careful though...you don't want it to get too tight.After every hit or two,check and see how far the latch is moving,and see if it's stuck.If stuck,take a large flat headed screwdriver and put it in the blade slot right near the latch and gently pry the area open a little..just enough to loosen the latch.
If you have a centerpunch,it's a lot easier to use for this,as it concentrates on just the pin,but make sure the other side of the handle is sitting on a hard surface with some protection between it and the surface.Also,remember to hit both sides of the pin.
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*The* Lunatic Puppy
It wasn't me...It was my *good* twin..
My "inner puppy" made me do it..