I’m looking for fix for poly fretboard on Fluke. When I bend strings…..they ping on first and second string. Upon examination, I see a indentation on zero fret on these strings. When I bend the string pulls out and pings. I was skimming This thread and found a reference yesterdY but can’t find it today. Anybody know if sanding the indentation on zero fret will help. Of conversely, add glue and powder to even out the ridge. I’ve reached out to MFC….waiting for reply. I started another thread on topic and got a rep,y that MFC send out some rubber tubes to run string thru when in nut slot. Suggestions of pics of fixes? Thanks