I saw on a tonewood site, an offering for a Doug Fir neck blank. Anyone have any experience using this wood for a neck? I always thought Doug fir was a softer wood. I've seen it used as soundboards. But the website also has back and sides for sale as well? Should I use a carbon fiber rod in the neck like I use on a spanish cedar neck? Not sure what to do. Here is the listing info: Douglas fir Neck Blank, Salvaged Fine Grain Old Growth, Excellent Tap Tone, Multiples Available, Photo is Representative. Each Approximately 2" x 3.5" x 19"