Closing box

     I closed boxes for SSJ and Nylon models. Both bodies showed excellent tap tone as usual. Although, the tap tone does not tell 100% tonal characters, Lutuz spruce showed pretty much the same tap-tone as German top. So, this is at least a good sign for me. Nylon model has an European top as my standard, and showed pretty long sustain for a tapping.
      I also completed Graphite rods installation on the 12-strings guitar I made last year. I replace the finger board, and partially re-finished the neck. After 2-weeks of curing the finish, I completed the final polishing. Now, I am working on the fretting work for this 12-strings guitar.

Ready for closing box

Both SSJ and Nylon models are ready for closing box. Both models employ the lattice bracing for the back. This time, I made a super light weight back lattice bracing design. This design is for more lively sound tuning to make better vibrations. SSJ model has massive graphite braces for preventing the body deformation. Nylon model does not need the graphite bracing; however, this model has a massive L-shaped head block with strong but light weight solid linings for the top side. L-shape head block has an extended fingerboard support all the way down to the 24-th fret. This fingerboard support makes crispy sound for very high fret position. After close the box, I will do many detailed jobs for purfling and binding installations.

Side and Back are ready for assembly

I completed 12-strings guitar modification projects. Now, I back to the guitar making. I installed Graphite braces for improving the body rigidity. These graphite braces will be able to prevent a slow neck angle change issue over many years. I also shaved back lattice brace cross sections to minimize weight. Now, the side and back are ready for assembly. Next week, I will close the body.

12-strings model design modification

I changed the body construction for 12-strings model. This is for minimizing a body deformation issue. I have been observing substantially serious action change issues for the 12-strings model. This is due to the strong string tensions. To minimize the body deformation issue, I installed two massive graphite rods from a top of the head block to the bottom of the body wast. This design is not my original idea. Similer techniques have been seen many hand made guitar makers such as Mike doolin guitars and McKnight guitars. I followed those ideas. I hope this design modification improves the action change issue.