Granite Sink Cut Wrong?

[M00sealini]

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Daz Gizmo pid='64553' dateline='1514472776']

We recently had granite worktops fitted and we are disappointed with the cut for the 1.75 under-mount sink. The fitter asked in advance if we wanted the granite to overhang slightly, so yes this is what we wanted, I believe it is called a 'negative reveal'. However we expected the cut to follow the lines of the 1.75 sink and the negative reveal would be consistent and equal. When we questioned the cut, the fitter insisted that the cut he made was normal for this type of sink ...We can't find any pictures online with a 1.75 sink cut this way and think that we are getting fobbed off. Any thoughts?

According to the Smeg technical drawing found here the cutout looks correct

Thanks for your input. The fitter did not refer to the manufacturer's tech drawings at any point. He measured with a tape measure then cut and polished with an angle grinder. I didn't see his cowboy hat, but in hindsight i should have looked for it beforehand...I think we have suffered from the restrictions of an onsite cut compared to template and factory cut.