no need to move stuff around. You can change the setup to ring which ever phone(s) you want from whatever sp(s) you want.
Configuration Name
Primary Line for Outgoing CallsPhone 1Phone 2
Incoming Calls Will Ring OnPhone 1Phone 2
on each SP and set as appropriate.
I have mine set for GV1 (mine) as the default out for Ph2, and rings on ALL sp's (GV1, GV2, Vitelity, Asterisk),
On GV3 the default out for ph2, and rings on ALL sps.
Does that help?