pn_day Posted November 10, 2023 Share Posted November 10, 2023 (edited) Dear all, Background I have a B2AFL (the factory fretless model). There are some markings on the fingerboard from previous use of round wounds, and a few nicks on the board as well. I think this might be the reason that the G-string develops a rather sitar-like resonance when the neck relief is low (I noticed it when I tried out tape wound strings, which didn't have enough tension to put much relief on the neck even with the truss rod loosened completely). For now I'm living with slightly more relief, and therefore using the old flats that came on the bass which have slightly higher more tension than I like. I believe from searching online that the fingerboard material might be ebanol. I've never done any neck sanding before. I was wondering about either just sanding down a touch to try and flatten off any high spots, or alternatively coating with CA glue and sanding that down - to try and fill in any low spots. Questions Do most people use a radius block for sanding a fretless fingerboard, or do you just use a long straight edge and do it by eye? Does anyone know what the radius of a 4-string Hohner B2A is? Is CA glue coating of an ebanol board possible or recommended? Many thanks for any tips you can offer. Phil Photos are attached to show the latest iteration - added glow in the dark stickers as some of the dots had worn away, swapped out the EMG Select humbuckers for some Warman Twin Locos, and swapped out the stock wiring for a VBT+SP harness from @KiOgon Edited November 10, 2023 by pn_day Adding photos 1 Quote Link to comment Share on other sites More sharing options...
Geek99 Posted November 10, 2023 Share Posted November 10, 2023 (edited) You can buy radius gauges and so learn but also maintain the radius as you work https://www.google.com/aclk?sa=L&ai=DChcSEwjLrfK6xLmCAxWZme0KHQrXBWcYABANGgJkZw&gclid=EAIaIQobChMIy63yusS5ggMVmZntCh0K1wVnEAQYBiABEgIQWfD_BwE&sph=&sig=AOD64_392f9atchnt_3QDbR1vSWViFfLFA&ctype=5&q=&ved=2ahUKEwiT2-q6xLmCAxXARkEAHTsWAC4Qwg8oAHoECAUQKg&adurl= Edited November 10, 2023 by Geek99 1 Quote Link to comment Share on other sites More sharing options...
Beedster Posted November 10, 2023 Share Posted November 10, 2023 I learned a big lesson trying to sort a fretless board. If you're not 100% sure, take it to a professional 👍 1 Quote Link to comment Share on other sites More sharing options...
pn_day Posted November 10, 2023 Author Share Posted November 10, 2023 Thanks to both of you. I've ordered some radius gauges to at least measure the radius of the neck, then I'll decide after getting an idea of the radius. And thanks @Beedster for sharing the hard-won lesson! Phil Quote Link to comment Share on other sites More sharing options...
BlueMoon Posted November 10, 2023 Share Posted November 10, 2023 2 hours ago, pn_day said: I believe from searching online that the fingerboard material might be ebanol. Correct 1 Quote Link to comment Share on other sites More sharing options...
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