For setting up Time Machine I guess.
I mean the setup and usage. The speed measurements could be an additional short section (especially, if there are speed differences to the Time Capsule).
A raw text with screenshots would be perfect. In addition I could setup one of my older Mac minis for generating screenshots by myself. Entering and formatting the text within the blog would be my task. 
Well, for the setup I just used someone else information here + the samba-vfs-modules but let me say first that Iām a absolute noob 
(for example, I donāt know why it works after the samba-vfs-modules step, I just triedā¦)
about usage, my idea is to have two different copies of the backup in case something goes wrong.
so if you think that It can helpful letās do it, but about troubleshooting Iām the last person you should ask for help!