You may join this Google Group in two ways...
First, log-in to your Google Account and go to https://groups.google.com/forum/#!forum/catalina355, and click the  "Join this group" button just above the welcome message.  Or, complete this form.  One of the forum administrators will send an invitation link to your e-mail of choice.  You must click the link within seven days for the invitation to remain active.  Regardless of the way you choose to join, it is important to state the C-355-related reason you are interested in joining.