I'm new to the ZHP world and I'm not too mechanically inclined, either.
My father swapped the rear end on his non-ZHP 330 to get from a 2.93(?) final drive to a 3.46 final drive ratio. He's suggesting I do the same on my ZHP as he likes the quicker acceleration and because reducing top speed has few implications at non-Autobahn speeds of daily driving.
My mechanic is quoting me at ~$900. Is this kind of mod worth it? What are the cons (besides price)?