On 27/06/2017 15:55, john west wrote:

Grateful for any suggestios on an 'easy to set up' solution.

Start a private or secret Facebook group. Administrators have full
control of the page, and users only need a Facebook login and membership
of the group, as well as a web browser newer than IE6 on whatever they
use, be it a phone or a Cray supercomputer. There is no setting up
unless they want to for the users.

If you know of an expert whose expertise you need, you just invite then
to join the group.

--
Tciao for Now!

John.