Individual FTSD at Go-Live

Friends, When we use single global FTSD date from the template, at the first - go live run, it will slice through all the major info types creating a split for payroll in SAP system (Core Hybrid). We are thinking to use individual FTSD Data ECPAO_PN_FTSD or BADI HRSFEC_B_CE_DECIDE_HIRE_REHIRE by do...