I'm sure this will be sacrilegious to ask but why did the have such a convoluted seat and fender mount on the V7 Sport and the 750S and S3? I mean aside from "it's Italian!"
Am I wrong but couldn't they have hinged the seat from the fender? They could have used the same mount that they hinged the fender.
And you can't say that it helped with the rear wheel removal as they didn't hinge the later bikes.
Last point first. It
did help with rear wheel removal. Try to take the rear wheel out of an 850T while it's on its main stand and on the ground. You can do it on the old 750s. The clamping arrangement for the fender tip also allows the seat to be fully raised to near vertical.

Removing this feature was just a cost cutting backward step.
As there
was a good reason for having the flip up fender, it had to be hinged from the seat and not the frame. You can't have both hinged there or the seat would prevent the fender being raised. One or other of them has to be fastened to the frame somewhere!