All About Pocket Knives

You guys haven't let me down so far so... Is there any way to tighten up side to side blade wobble in an older slip joint other than having it professionally done? I have a few older users, nothing fancy, that need some help. As always, I appreciate the input. Thanks.
Nick

If the knife is a user and has no collector value, you may be able to indent the bolsters a little on each tip. That will take the side to side play out of the blade.