Odd that the 2 doctors told you you would not be getting a 3 piece lefort. Simply because the VSP for one doctor looks like that was entertained and as for Gunson, he often does them.
There are some odd things about this. But in the VSP you refer to, the doctor actually doesn't call that a 3 piece lefort, and the segmentation you see will probably not be performed. This was a segmentation that was done in case I wanted to do surgery first, and not decompensate the bite orthodontically before surgery. When I visited him he said something like "this is similar to what we do in a 3 piece lefort, which we will not do in your case". And the purpose was to open up and angle the anterior teeth forward, so the mandible could be advanced to a class I relation (from class II). When I asked him at a later stage if I had understood it correctly that this was not needed if I had proper orthodontic preparation he said yes, and that orthodontic decompensation was prefered. So maybe it's a play with words, but the palate would not be split all the way back in this case, only the anterior segmentation would be done.
I specifically asked Gunson "will there be any transverse widening", the response was NO. But then it's odd in this case as well, because when the quotation arrived and I read the orthodontic preparation notes, it was quoted as a segmentational lefort, and that the orthodontist should prepare gaps to prepare for a segmentational lefort. Maybe they want to keep it open to decide at surgery day, but didn't see any obvious need.
Anyway. Is a segmentational lefort considered one of the most risky procedures that is only done in special cases? Because I mean, many aspects of the surgery I'm having, and many others are having does contain medically "unecessary" parts, which mostly is done for aesthetic reasons. I mean, my bite could probably be fixed with a BSSO only, and posterior downgrafting is probably unecessary complicated for any medical purpose in most cases.
Is there a difference from a SARPE and the C case in your picture? Seems like it's same, just that the SARPE cases I've seen create crazy gaps between the teeth. Like this.
https://drrichardjoseph.com/assets/images/sarpe2.jpg