The rear latches on a fake 550 Spyder are usually just Beetle front hood latches, and this car is typical in that regard. On the Beetle they didn’t have to work so hard. The hood was a bit heavy and the shape of the nose tended to keep it down at speed. On the 550, not so much. The under-clam area is fixed to become a high-pressure system and, of course, the hinges are in the back, so if it pops up it becomes a sail.
A lot of replica owners rely on the leather hold-down straps that add such style to these cars. You hear complaints all the time that the latches “pop” when the car goes over a bump. I’m making this car not do that.