Naturally, when you put epoxy inside the handle, as I think most of us do, it fills in any gap that might be on the back side of the guard. Problem with that is that if your guard isn't very closely fitted the epoxy can ooze through the front of the guard. Having the JB in there prevents that. I have no doubt your guards are fitted well enough that you never have that happen but mine usually don't fit quite that well and I feel pretty sure most of the guys on the Newbies Forum could easily have that issue as well ....
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