Mike, I have another thought that you may want to give careful consideration to: When using "salvaged wood" it is a good idea to use a metal detector made for this purpose to prevent damaged tooling. Often wood may contain embedded fasteners which have become oxidized to a point of not being visible on the exterior surfaces. Depending on your milling procedures, the effect can be anywhere from a spark to a bullet. Please be very safe! Also, occasionally; freshly purchased lumber can contain embedded items which are harmful, as well.
OPG3 Tweak everything!