Bad form in posting back to my old posts, but just to let you know, that I've finally fixed it.
Phil, I dug around regarding your suggestion and found this:
https://forum.pfsense.org/index.php?topic=76015.0
All working as intended!
I've not restarted any of my client VPN connections, or rebooted, but I'm sure that if the client comes up with same interface (ovpnc1) then I consider myself a happy chap.
Only 1 year in the making… wow.