That's what I'm trying to figure out. In trying to determine the maximum amount of allowable overhang, according to the Marble Institute of America you can safely overhang granite that is 3cm thick up to 10" without supports. However, the cantilevered portion cannot be more than 1/3 the total width of the countertop.
Hmmm. I might just continue with a design similar to yours, with the fallback that I could add some of those "mini" supports if the counter installer insists on it.
Thanks again, Mario.