I currently own an x920bt and am considering upgrading to an x930bt or z130bt (leaning toward z130). Anyone know with certainty whether these three share common wiring harnesses? If the upgrade were simple plug and play leaving the existing x920 wiring connections intact, I would be much more likely to pull the trigger.

Thanks to any that can help!

You could just wait for the x920 update that will turn it into an x930 from what I've been reading.

Could, but tempted by the larger screen in the z130...