The unique aspect to this guitar is that the top (and back) is made of two different types of wood. The strip down the middle is old growth douglas fir (reclaimed 2x4). On each side of that is cedar (reclaimed siding). The back is exactly the same as the top (but the lesser-quality wood with chips, nail holes, cracks, etc was used). Standard Martin X-bracing, with old growth fir braces.
The neck is again old growth douglas fir down the middle and cedar to the sides (second growth cedar this time, leftover scrap from the "Home Depot fence-post guitar"). There are a half-dozen big nail holes in the fir - you won't find that on a "Guitar Center" Chinese factory made instrument.
The finger board and bridge are cherry (reclaimed from a hardwood floor).
The sides are douglas fir.
The theory behind using two types of wood for the sound board, beyond the obvious "that is what I had in the scrap pile", is that I was interested in hearing how it affected the tone. Fir has strong highs and cedar has strong lows. By mixing the two, I had hoped that it would be balanced but with rich over tones. I am happy with the results, the tone is definitely different than my other guitars and it is indeed well balanced. It works particularity well for finger picking.
On my previous guitars, I have noticed a problem with the G string breaking (not that it happens very often, but it has *always* been the G string). On this guitar, I made the D and G tuners spaced a little closer than you'll find on a Martin. This reduces the angle of bend at the nut. I'm not sure if that will help or not with the string breakage, but I think the resulting narrower head is visually appealing.
