the export options for vector are .ai .pdf .dxf and .plt
the dpi is not an issue for .ai... the .ai file imports at the correct size.
.pdf creates a rectangle representing the C&C page size, which can easily be deleted in scal or whatever cutting program, but it annoys me for some reason. (the rectangle itself annoys me lol)
since export to .ai works well, I've never bothered with export to .dxf or .plt...
I wish it were, but export to .svg was never an option in either version of C&C.
hope this helps!