Robb, a few inches won't make a significant difference, so don't worry about it. For what it's worth, that's about what I arrived at for the height of my M22s after I got them five years ago. A specially designed variable height speaker stand was employed(stacks of old Stereo Review magazines; they sounded better than Time or Newsweek)and that's what was arrived at. My impression was that being slightly above the tweeter axis was a bit better than slightly below.

-----------------------------------

Enjoy the music, not the equipment.