One member, ForeverDet was his name posted before/after results here, and although he had great results, I noticed a few things. I don't claim to be an expert, but in his before photos, I observed the following:
-He had quite a forward maxilla. In fact, it was horizontally more forward than his forehead.
-Having a forward maxilla, his maxilla was also more forward than his cheekbones, possibly prognathic. Alternatively, his cheekbones were just recessed.
Now, when he had his surgery, his upper jaw was moved back, and his lower moved forward + HA to the zygos. After, I can see:
-There seems to not be much tenting going on by the zygos, that is, the skin on his face mostly tents up in the mouth/lower jaw and lower cheek area (NOT by the eyes)
So, is there the possibility that in some cases that the upper jaw should be moved back more, so as to be moved horizontally behind the zygomas, allowing them to do more tenting ie. S-curve
Or would the right step at this point be something like ZO to bring the cheekbones even more forward, if such an effect were desired?