Hello to everyone reading this, I hope you're well. Last week I ordered a Mighty Mite fretless P bass neck for my Squier VM Jazz. I installed it, shimmed it, and adjusted the relief. The string height at the nut was a bit high so I filed the slots with a small rat tail file. Over the last week I've been bringing it lower and lower to make it easy to play. Last night I was doing some more filing and suddenly I found some bad dead spots on the first 5 notes of the A string and a bit of buzzing at the nut. I believe I might have filed it too wide which caused the buzzing but could that also cause dead spots? I'm planning on picking up a new precut nut and starting again; sanding from the bottom instead. Opinions? Also, is there a way to get some "mwah" on the open notes? I've heard this tossed around a bit. I would prefer to have the strings as low as possible at the nut. What are my options? Thanks!