[LUNI] Fine tuning my samba setup

[Jay Strauss]

I'm having a hard time fine tuning my samba setup (regarding ownership
and permissions).  My salient bits of my smb.conf are:

[jblum#]
        path = /opt/FCM
        valid users = jblum, jstrauss
        force user = jblum
        force group = manager
        read only = No
        create mask = 0660
        directory mask = 0770
        hide unreadable = Yes

[phillips#]
        path = /opt/FCM
        valid users = phillips, jstrauss
        force user = phillips
        force group = manager
        read only = No
        create mask = 0660
        directory mask = 0770
        hide unreadable = Yes

[jstrauss#]
        path = /opt/FCM
        valid users = jstrauss
        force user = jstrauss
        force group = manager
        read only = No
        create mask = 0660
        directory mask = 0770
        hide unreadable = Yes

My goal was to have each of us users, view the same directory
structure, but when each of us create a file it would be owned by the
creator and only visible by the creator.  I (jstrauss, as the
manager), sometimes go into the jblum# share, create a file, and the
ownership is jblum.  This is the correct and anticipated behavior.

The problem is some of the directories under /opt/FCM contain shared
files (shared between all of us).  I want a common owner of "fcm" on
files in these shared directories, and rw-rw-rw permissions.  What
happens currently, is when jblum (or phillips) edits one of those
shared files the ownership is changed from fcm -> jblum and the
permissions are changed to 660.

I'm trying to avoid having a bunch of shares setup, just to maintain
my permissions and ownerships.  I'm hoping someone here knows how to
accomplish the above with minimal pain

Thanks
Jay