I agree with Jay. PS, Stubben has a very long tree point too. They do sweep it back, but it’s comparable in length to the Simatree R-bar saddles.
Gotta be honest, though…I have trouble envisioning a rider who would be physically comfortable and effective in the Stubben Roxane S (a very deep-seated saddle with a very forward flap, which is only ideal if you’re TALL and are purposely buying a bucket that will be hard to get unseated from on XC) and the Thorowgood T8 (a more middling design for a more average body type, medium deep seat, etc.) I would also be deeply suspicious that the fitter who suggested a 29cm Stubben tree is recommending a saddle without deep front panels and is trying to “fill” the gaps behind the wither by making the saddle really narrow.
That doesn’t take Stubben off the table, though, because Stubben does make some saddles with a deeper panel shape. And if your horse is wearing a Wintec wide gullet, then he’s still well within the range of how wide Stubben trees can go. I’m just saying to be careful that you’re not getting sucked down an unproductive fitting-philosophy rabbit hole. Buy your Stubben from someone who “gets” the need to fill dips behind a pronounced shoulder with either built-in deeper saddle panels or effective corrective padding.