I don't have a 30# wing or a Dive Rite backplate (although I do have an 18# Oxycheq Mach V wing).
If I'm not mistaken, the holes usually *do* line up between the various brands of backplates and wings, because they are standardized at 11" OC (for doubles use?). I think it may be the cam band slots that are not standardized between brands of plates and wings. Meaning that some may fit fine; others may not.
For example, I bought an STA from Sweden, wherein the fasteners are metric, and yet the holes are still 11" OC. OTOH, it doesn't even have cam band slots (you are expected to use an STA).
(My Oxycheq wing fits fine on a DSS plate, btw, but I think that is more "oh good!" rather than "guaranteed.")