I surely would not blame Melvin... It is not the first screen as the former owner did the same by fixing the deflector screens. So maybe the screen itself is not the perfect size within the frame.
I could have been a bit more careful...
1973 2CV AK400 Ralley 1985 plus 4 four seater 1992 Peraves ecomobil bicycles (pedersen to recumbent)
