 He wrote a business plan for a guitar making school in 1974, while acquiring an MBA degree from the Stanford Graduate School of Business.The plan became the blueprint for the Roberto-Venn School of Luthiery, which Roberts, Venn, Eaton, and Bruce Scotten incorporated and founded in 1975.Eaton added new elements of stringed instrument design and innovations, creating multi-stringed, one-of-a-kind instruments at the school since 1976.