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You can find the part I of this video series from here:
• 厚すぎるアコギのトップ板を薄くしてみる実験・前編
I have a guitar that sounds okay but not impressive even though I tried many different kinds of strings. I have been suspecting that the thickness of the soundboard of that guitar is to thick and I've wanted to measure it somehow, but it's not easy to measure the soundboard of a finished guitar,. I even thought thicknessing the soundboard without measuring it, but it's a bit scary doing it without actually measuring and also I didn't wanted to detach the bridge, so it never happened.
But recently I bought a tool to measure the board thickness using magnet (MAG-ic Probe) for my guitar building hobby, and I noticed I am now capable of measuring the thickness of that guitar's boards.
At the same time, the bridge of that guitar has just came off when I was restringing. I thought the timing is right, so I went ahead checking the thickness. As I suspected, it was too thick in my opinion (3.2mm to 3.3mm), and it thought it must sound better if it becomes thinner. It didn't take me long sanding down the soundboard.
In the part one of this video series ( • 厚すぎるアコギのトップ板を薄くしてみる実験・前編 ), I demonstrated thicknessing of the soundboard by checking the thickness, stiffness and the tap tone.
This part 2 video is the latter half of the series and I am re-finishing the soundboard with shellac by French polishing, followed by gluing the bridge, then restrung. How did it go? Please watch the video. I hope you will enjoy!
Guitar Specs:
Make: My 2nd DIY guitar (from StewMac Kit)
Type: Dreadnought Steel String Acoustic Guitar
Year: 2018
Soundboard: Sitka Spruce
Back & Sides: Mahogany
Neck: Mahogany
Fingerboard: Indian Rosewood
Bridge: Ebony (I think...)
Strings: D'Addario Phosphor Bronze Light Gauge (I haven't restrung for 6 months so a bit stretched)
Finish: Shellac French Polishing