I found some pics of the Cashburn Sweeper, and at least the place is right. If this is a sweeper, it's been modded significantly. The wing has much bigger ailerons with flaps instead of the narrow strip ailerons, and the fuselage is a lot thinner top to bottom than it should be. Mine is also a built up wing where the Sweeper example I found online was foam core wing. My wing is also longer than the sweeper version I found online, but maybe they were produced in both .40 and .60 sizes?