Durham, North Carolina–based guitarist and writer Alan Barnosky demonstrates his arrangement of Fernando Sor's "Etude No. 17," a staple of the classical guitar literature, played as a formidable flatpicking exercise. Read Barnosky's full lesson at https://acousticguitar.com/fernando-sor-etude-string-crossing-guitar-workout/ and in the May/June 2022 issue of AG, which you can find at https://bit.ly/3q7cetC.