Hello Everyone
I wrote a bash script helping maintaining the MyFamily string in torrc.
The idea is to have one single file with all relay nicknames and there fingerprints and generate the MyFamily string uniquely for every node in the family.
You will find a copy here: https://github.com/ryru/myfam
If you like a bit more background check out: https://blog.addere.ch/2017/07/13/myfam-a-utility-helping-you-maintaining-yo...
Hope this helps anyone!
cheers pascal