Was just about to share the N9repomirror on openrepos, glad you did already.
I have stopped using N9 for a while but still remember between vividly the steps to take when setting up the device.
After installing the N9repo mirror, you will be allowed to activate developer mode in settings, once that is done, use N9QuickTweak to get the aegis installer hack on the device.
https://openrepos.net/content/schturman/n950-quicktweak
After that, you should have a fully tweaked N9.
I do miss that device, only Jolla could possibly replace that jewel