Anders Eliasson -> RE: Laying out scale (Apr. 16 2012 8:04:25)
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The lewis plan has two bracing systems. The drawing on Mr. lewis plan is not his concept but a Barbero. The Lewis concept is there as some extra points etc. but its not drawn. I think the plan is good and for a beginner it has the advantage of being a more standard bracing system, whereas the other Barbero plan is a weirdo. I´m not saying its a bad layout but as a referencial point its not so good. You start building something strange. I have built many flamneco guitars with a bracing system very close to the one on Lewis´s Barbero plan and they were very nice. The plan is very close to many good Spanish bracing layouts like Torres, Reyes, Santos, etc (7 braces pretty parallel, 2 closing struts). I´m now building another system. Also my own, but Lewis´s is a very good starting point and it´ll be easy to understand many other systems. I personally find that its the best place to start for beginners. If building a 650 scale, I place the center of the soundhole 15cm from 12th fret and if it a 655 scale, the its 15,5cm. 5mm wide braces, 4mm high on a good quality Euro soundboard more or less 2,2- 2,3mm thick all over the board will make you a good sounding and playing guitar. When finishing the guitar, the edges will be thinner and if you end up with some 2mm on the edges and 2,2mm in the center, then you´ve done it well. BUT remember that thickness is only a helper. It depends on the piece of wood you are working and crossgrain stiffness and weight is a lot more important.
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