Hi Geoff, sounds fantastic! I hope you have a really good turn out and enjoy yourself immensely.
I'm not sure if it's solely because I'm not on Facebook, but I get this message when I click on your link:
"This content is currently unavailable.
The page you requested cannot be displayed right now. It may be temporarily unavailable, the link you clicked on may have expired, or you may not have permission to view this page."
Not a problem at all if your promotional poster has all of the necessary information for those able to go along (I'm too far away to visit, sorry!), but if there's more detail on your Facebook page, non-members won't be able to access it.
Anyway, internet conundrums aside, I wish you well with your exhibition. As I've mentioned about your previous shows, they definitely look like something anyone who appreciates skilful printing and really well thought out and executed photographs should get along to see. Good luck and have fun.