Becoming an IPC-A-610 Class 3 supplier

I've been tasked with finding out how difficult it would be to convert our company from a Class 2 to a Class 3 supplier. Does anybody know if there is a "how to" manual available to assist me in getting this done. Short of going thru all of IPC-A-610 and documenting every possible difference, I'm not even sure how to go about this. Is there a list somewhere of the "major" differences between Class 2 and Class 3?

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