So, ACOG used to recommend against what you are suggesting because they medically believed the research supports the safety of RCS vs VBA2C (without a previous vaginal birth), but now says it's reasonable although the rupture rate may be higher- but old habits die hard. Shoulder dystocia is not just from a bigger baby, but also because in GD the shoulders tend to be disproportionately be bigger. But regardless, if you are not worried about 'burning bridges' with your current practice, I say go for it. I guess it's more of an issue of the gap from 39-? weeks of pregnancy- would you feel comfortable forgoing the NSTs and AFIs for what could be considered the riskier part of pregnancy (one could argue that the longer pregnancy continues, the higher the risk of stillbirth, and GD is a risk factor for stillbirth). You could go to the VBAC hospital claiming something like decreased baby movement, get evaluated with NST, then check out to return in labor, I guess (I know, it's deceitful, but you are being forced into a corner). It sounds like overall you are pretty comfortable with the idea; what you are proposing certainly sounds reasonable IMO.