Then in 1998, Monnett and his design partner, Peter Buck, introduced the Sonex, a two-seat, side-by-side taildragger designed for an AeroVee, or Jabiru engine. He was back in business…this time with his son, Jeremy. Together, they built up a thriving business, working their way up from plans sales to one of the most sophisticated kits in the homebuilt market. It’s a kit designed “for IKEA customers”, where you need little more than a wrench and a screwdriver to put one together. There’s little fabrication anymore; mostly assembly, and the illustrated instructions are elaborate. The Sonex, which now sells for $27,670, with an AeroVee engine kit, is available as a taildragger or tricycle design. There is an option of being able to purchase a Jabiru 80 or 120 hp assembled engine. The Waiex is a Sonex with a “Y” tail and the Xenos is a motorglider. The company has sold over 2,000 sets of plans and about 1,800 kits. They know of 365 completions that are flying today. The Onex, a single seat Sonex with folding wings, is available for about $25,000. It was designed and developed by Jeremy.