 Upon returning to the States, Schreder refined the design slightly, added retractable landing gear, and offered it in kit form as the HP-11A.Over the next few years, Schreder leapfrogged through the HP-series by successively developing new wings and then new fuselages for his glider designs.During this time Schreder also formalized his glider kit business, incorporating under the name Bryan Aircraft, Inc.