A bit a of a complicated question, but here goes. Can a subsequent owner of an EAB aircraft modify the aircraft? For example lets say that aircraft has engine A and original builder signed of 40 hour test period and a note that says its LSA compliant, ie stall speed, weight, speed at some RPM. If subsequent owner makes an engine model change to say engine B (same HP, etc), can they test fly airplane, verify parameters and subsequently make a log entry that it is LSA compliant at stall speed, weight and perhaps a new RPM? I guess the question is the original owner the only one that can make changes such as this or can subsequent owner?