CUP Manager Plus 1 Escalation Functionality

I am attempting to configure CUP, using LDAP as my source system, to obtain manager level approval. I have configured LDAP fields so my request auto populates the user / manager information. However, my company is interested in escalating the manager request to the manager's manager after 3 days. I don't see how to perform this function. I have reviewed the Best Practice documentation regarding escalations and none of their solutions seem to work. Their solution involves physically mapping a step up manager within the Alternate Approve box in the manager stage. That does not address a situation in which a company has say more than one manager. Hence, I have to assume the world is using different stages, detours or paths to accomplish this functionality.

Question:

(1) Can I build a custom field so to pull in the manger's manger from LDAP if such a field exists and then use it to notify this new manager after the 3 day duration?