I think, a lot of owner would be interested in the trunk brace. If they want, they could have 2 types of trunk brace.
First one can be Spencer Fab style design & have it like this
Type 2 can be for racer, that have a brace that goes down to struts, so it reduces flex. So mix top pic & this
That should win for both race car owner & daily owner w Type-1 & Type-2 braces.
But that’s just an idea.