Hello
This might be another take on things, as I am on my third regulator,
the orignal one burnt the wires out at the main junction block melting everything, so I thought cut the wires back replace regulator and all would be fine, same thing happened, for me personally using the bike over winter/and on wet days I found the connectors were covered in corrosion due to salt from the roads.
So went down the Electrex route,
even went to pick the new regulator up, so to ask what the heck was the difference between Ducati part. (this was a few years back now) and my answer was they are exactly the same as VFR regulators ie refurbished.
so I took away a regulator that even though has smaller wires the base unit is a better build, I was advised that your problem would start from the regulator outwards, ie ducati wiring.
I have replaced the orignal connecting blocks with straight through thicker guage wires, and touch wood all well.
regards
TopiToo