Greg, from what I understand Squirrel Works purchased the rights to the design from Thrustline. They have produced an Arapaho E kit: https://www.squirrel-works.com/catalog/arapaho/arapaho-e.htmlI'd love to build an Arapahoe E from scrathc for a 24mm motor. Are there any plans available somewhere & maybe a parts list? It is one of the sweetest designs I have ever seen.