Are you sure?
I've tried the solution for punto: all working!
Punto and Mito have the same file, same maps etc, only hw/sw number changes in binaries and other points, the engine management is the same.
In proof of that, i've also tried to write the punto file on the mito changing only hw/sw and all is working, no a single error.
So, i applied the mods on the mito file and writed, checked all params and is all ok: the solution for this punto is tested for about 1 year without dtc/recovery or any regeneration, so i think it can be considered ok.
I sent you the files, the solution may be useful for some other customer who wants this type of mod.

Thank you again for your time, regards, Andrea