Setting up FreePBX 13 on a centos based pi

Whilst there is a complete raspbx project out there, it builds on the debian linux system favoured by many pi projects, whilst freepbx favours Centos. There is a FreePBX installation guide for Centos 7 at:

However, when installing on the pi, I have found a few wrinkles when trying to follow that guide, and have written a ‘how to’ which, I think, avoids them. Would it be possible to add it to the wiki? I’ve logged into the wiki but I can’t find an ‘add page’ option!