hi, i want to ask about lock...
my original door grill is with this lock: ST Guchi Italy 40mm SS Mortise Lock (SLC-181)

But i dont like the key hole, it is big.

can i change to ST Guchi Italy 60mm SN Euro Profile Cylinder (SGSC60P) or something similar?

my contractor told me i only can change to the same type (big hole & big key) which i don't like.