Thanks MatPed,
I've begun to experiment with this and it's a workable solution for now. I'm doing something like this in a separate file:
#include "alternate/path/to/strategy/file.c"
#include "alternate/path/to/strategy/file2.c"
#include "alternate/path/to/strategy/file3.c"
#include "alternate/path/to/strategy/file4.c"
then running from the appropriate Zorro instance Strategy folder as needed (after commenting out some lines as required)
Is this similar to something you're doing?