translucent overlay to add local entries if they don't exist remotely?

Question regarding the translucent overlay.

Say I wanted to create some entries locally that don't have corresponding remote entries. For example, if the base suffix is dc=foo,dc=bar, and the remote ldap server has, let's call them user entries at uid=myuser,dc=foo,dc=bar, and I wanted to locally create ou=group,dc=foo,dc=bar and put my own group entries in that, is this possible with translucent? Or maybe with a combination of overlays?

Ok, I know I can create local-only entries, but any search requests for them fail. Is this what ITS#5283 is supposed to accomplish, without going through the hassle of trying to build HEAD?