Campus Solutions to HCM Integration: miscellaneous questions

Hi,  I have a few questions in order to help us come to a decision concerning the integration model for CS and HCM. If a new customer were to install the latest release of CS and HCM, Is there an approach which Oracle recommends? Given that there have been multiple white papers prepared on the subject of splitting HR and CS, could you provide a summary of the impact of each of the four approaches? Will future updates (bundles or releases) of HCM take into consideration the owner/subscriber integration when CS is the owner of Biodemo Data?  Would it require