Posted on June 25, 2026June 25, 2026 by Dale Phillips Beyond the Rule of 18: Intonation For the 21st Century Beyond the Rule of 18: Intonation For the 21st Century by Gary Magliari and Don MacRostie from their 2011 GAL Convention lecture Originally published in American Lutherie #116, 2013 Don MacRostie: I wear a couple of hats. I do product development with Stewart-MacDonald and build Red Diamond mandolins. This is Gary Magliari, the creator of the intonation system we are going to discuss today. We started working on this about five years ago after Gary showed it to me at the Newport Guitar Festival. His method really seems like a benefit to me, and I think it’s time to make everybody aware of what he’s done. I believe there are a lot of little things I can do as a builder to make a good or great, or whatever you want to call it, instrument. Things like using glues and woods that have better acoustic properties, tuning those woods, and applying finishes that improve the output create a better instrument. These are little things and if you leave one out, it can still be a good instrument. Become A Member to Continue Reading This Article This article is part of the Articles Online featured on our website for Guild members. To view this and other web articles, join the Guild of American Luthiers. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.