Has anyone had to replace a core unit yet after they have already setup their map? If so, please tell me you were able to keep your existing map and did not have to remap just because you got a new unit? Potentially related question / solution is if it's possible to have more than one unit connected to a data center at a time? 

I just got a replacement unit and REALLY don't want to have to remap my yard and obstacles again. 

Thanks for any and all advice! 

V/R, 

Cody