Pistachio is a rather dense hardwood, which makes it good for the back and sides of an instrument. But, you have to get the thickness right or the uke will be on the heavy side. I feel like I’ve finally got it dialed in! The combination with the spruce top makes for a lively sound with good projection and the low g adds surprising depth. The pistachio is from California Orchards, the spruce top was cut in 1960’s for a dulcimer builder and the fir neck is from an old floor joist.