Here is some interesting stuff taken from the Guitar.com review. https://guitar.com/review/acoustic-guitar/fender-american-acoustasonic-telecaster/ "The specially tuned sound port (aka Fender’s patent-pending ‘Stringed Instrument Resonance System’) is a mahogany hoop that’s glued into the soundhole but doesn’t touch the back, while the top itself is supported by a pair of parallel longitudinal ‘transverse’ braces. Almost like archtop bracing, these run the length of the top on either side of the sound port." Looks interesting. Wonder if it should be attempted to make something like this, or just leave sound hole as is?