If you also install the small fitting strip at the height of the front, I think it looks better than a fitting cover set back by 10 cm. Of course, that is always a matter of taste.
When the fitting strip meets or ends at the front, how is the moisture protection handled? The edge is then cut, can it be sealed or something similar?
I don't want to open too many threads ... if I have three 60 cm cabinets, the corner cabinet that is 7.5 cm longer, is the 246 cm countertop then enough? That would give me a width of 247.5 cm