I had a new ebony fingerboard fitted in 2008 by a local luthier, and I was very happy with the setup at the time. He took the time to look at my playing style and really nailed it for the sound I wanted. A few years down the line, the setup is still good over most of the bass, but there is a very slight bump in the board under the G string which causes the three notes below that to get buzzy a little too early when played pizz. I presume the wood has moved slightly with time. While I have noticed this for the past year, this week I changed from Spiro Mittel to Weich and this has highlighted the issue. If I hold a 30cm straight-edge against the board under the G string with a light on the other side, I can see that there is a slight bump at the f sharp just below the octave (in other words, where the unsupported part of the board begins). I do not notice this under the other strings, so it looks like only this area needs work. Ideally I would go back to the luthier who fitted the board, but he has now retired. I have been searching around, but it appears that the closest luthier with bass-specific knowledge is 50 miles away, and as I don't own a car, this would involve a car rental. Would I be crazy to gently shave the bump with a scraper, checking with the straight-edge and light as I go? I'm wary of chasing the bump up and down the board and messing up the scoop, but on the other hand it looks like it could be achievable if done slowly and carefully. Of course, if any experienced luthiers want to tell me to just rent a car and get it seen to, I'm open to that too!