"b.. Aircraft meeting the above specifications, such as a Piper J-2 or J-3, Aeronca Champ, or early model Taylorcraft, may be flown by sport pilots."
Colin, The above statement that you quoted probably says it all. To be operated by a Sport Pilot, an aircraft does not have to be designated as an ELSA or LSA as long as it meets the various requirements of weight, simplicity and performance.....so I guess it is in writing. A builder who modifies a plans built plane during the original manufacturing process is not modifying an existing aircraft--he is building a new aircraft. The ELSA and LSA classification designations appear to be for production aircraft and factory produced kits. The aircraft that qualify to be flown by a Sport Pilot seem to be another issue. Example: A Piper J3 in its original configuration is not a LSA aircraft, but it can be flown by a Sport Pilot. I have submitted questions to the FAA and EAA and in the meantime continue planning for the "Flying Hershey Bar KR2S-1"......and I will continue to use "seem to", "appear to" and "probably" a lot when writing on this subject. Dick Hartwig Waunakee, WI rhartwi...@juno.com