As I understand it from what I've read:

 

1. If you place an unlocked Z1 hard drive in a Z2 unit it will allow the two wire bypass.

2. The Z2 software (i.e. routing, iPod interface, Sirius interface, etc.) is almost exactly the same as the Z1 with little or no improvement.

 

So what I want to know is where are the map files on each hard drive and can just the map files be swapped (move the maps from a Z2 HD to a Z1 HD)?

 

The only reason I haven't ripped out my Z2, sold it on eBay and replaced it with a Z1 is that map accuracy is very important to me. Did I miss some post explaining why this is not possible?