Not true. You broadhead tune with whatever broadhead you're going to hunt with, doesn't matter what design it is as long as it's the same as you're going to use. I'd expect that if it was a high profile multi-blade and you get it tuned properly, it's going to shoot an expandable or low profile head equally well, just like it's going to shoot field points as good or better than it did before it was "fine tuned".