Stilicho
Well,there are more differences between an"F" ad a "G" than gun breech covers and the oil filter. I think Erich's machine differed from Gerhard's by more than the personal "Tulip" also -but you did get a 3 piece canopy as well. Jo-Han here claims to have invented the idea of putting numbers on tabs next to the parts; these being the same as those on the assembly drawings. If so, they were real pioneers.