I couldn’t fit “gravitational” onto the label.
Here is a new kid on the block. I got most of this wood for this particular instrument from a dear friend a decade or so in the past. The top is haselfichte (bearclaw) figured spruce. The back and sides Honduras rosewood. The nect is Honduras mahogany. The design is basically Hauser. I just strung her up yesterday, so the kinks are not yet out of Gravity Waves.