This weekend I started with the first build.
I wanted a s slimmer body at the horn and where the belly cut is so I started with some 80 grid sanding and went up to 600 before applying the wood filler and stain.
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The idea was to pop the grain by using black wood filler and sanding it back but the effect is not as strong as I thought. Nonetheless I went on and stained the guitar with a water based mahogany stain that I bought a few month ago. It turned out a little more red and dark than I intended so I had a little fun mixing my stains and added red and a little black.
Why add black and red if it is too red and too dark? Because I kinda liked the color but I seemed a little to boring to me.
This is what I looked like after a light sanding and two thin layers of the new mixture.

First layer vs Third layer
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Other than that I tried a little experiment on the neck. After some of us discussed the necessity of inlays in another thread I liked the idea of black inlays on a black fretboard. So I stained the maple black and I think it works out.
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On the TL I checked the fitting of the neck again. I was hoping to see some change after it adjusted a little more to the german climate. But it is still pretty loose. So I will probably try to apply some woodfiller to narrow the neck pocket when I route the hole for the humbucker.
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That's it for this weekend. Until I will be able to go back to the workbench I will be shopping for some accessories (switches for phase revers, pots etc).