I’m getting ready to replace the 3 bridge saddles for the plain strings on my 335. Seems fairly straight forward however, I have a question/concern. I see that at Gibson the builders tend to use a plastic/dead blow hammer to make the unwound saddle notches. Is it safe to do that on a semi-hollow guitar, or is it best to just mark & use a nut/saddle file? I’ve never notched saddles on a semi-hollow before.