Normal
Unfortunately almost any changes at PCB level will require rerouting of all traces, or possibly adding layers based on density and meeting impedance. And if you change your PCB all your testing is no longer applicable, and testing is the bulk of that cost.There might be same room for a base template modification - but I haven't ever had a project be approached in that manner as you're going to be paying somewhere near that cost either way, might as well get a full custom board out of it.
Unfortunately almost any changes at PCB level will require rerouting of all traces, or possibly adding layers based on density and meeting impedance. And if you change your PCB all your testing is no longer applicable, and testing is the bulk of that cost.
There might be same room for a base template modification - but I haven't ever had a project be approached in that manner as you're going to be paying somewhere near that cost either way, might as well get a full custom board out of it.
