Has anyone been lucky enough to downgrade an MICS without the system id changing, if so how did you do it? I have a customer that just picked up an MICS with XC and both combo cards. He does not need 2 combo cards so he was going to move one to another location where he does need it. The system does have the PRI code in it so I told him I would see if anyone has been able to do it but I myself have not. Anytime I've downgraded it did change the system id.