I let this sit in my brain for a few days and decided I didn't want to add grease to my instrument either. I took inspiration from the well known Bastari fix for loose buttons: silicone tubing. I got some 2.5mm ID, 4mm OD clear silicone tubing and slipped it over the left hand side buttons, then pierced through it a few times with a needle to allow the button to slide back over the rod.   I've been playing it with this change for a few days and have not had a single buzz. The buttons a
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