MusicianAtHeart BRASS SHIM SET (6) for Bolt-On Guitar Neck Adjust - luthier tech | eBay
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Brass Luthier Neck Shim, Guitar Neck Repair Shims 0.2 mm 0.5 mm 1 mm Thickness Non-Damage Good Match Corrosion Resistant Tailor Setup Protective for Bass : Amazon.de: Musical Instruments & DJ
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How to Shim a Bolt-On Neck — Haze Guitars
StewMac - How to shim a guitar neck so the strings don't... | Facebook