We are currently doing a limited run of Adirondack Spruce kerfed lining. This is a great way to add an extra special touch to the inside of your next build. Not to mention another great option to be able to offer a customer on a spec build. While basswood is a great substitute and has become the industry standard replacement, it's hard to deny the look of traditional spruce kerfing. We have a limited amount of spruce that we will be using for this kerfing so get some while you can!
Check out the Tonewood Data Source! The owner of this site has put together a wealth of information on various tonewoods as well as descriptions and pictures. A lot of work and research went into this site and it is definitely worth spending some time looking through. Enjoy!