So I have a "Family Heirloom" quest that is broken. The quest arrow points to nowhere. I managed to mark it finished from the console, but the Companions still say "you are working on something with Skjor" and won't give me any more quests. Is there something else I need to do?

So, if you think the quest is broken and you're going through the console commands, I assume that you found the quest via player.showquesttargets or in the CK. The process I use and have found elsewhere (Not Steam): 1. showquesttargets. 2. showqueststages [questid] or [name]; 3. setstage [quest id] [no.] (which is the first number showing zero from showqueststages. Voila (as the French say it, totally ignoring voici as if it didn't exist).

And if you're sure you have done the above currectly -- Are you sure? Are you sure? are You sure? -- Find the next quest and type in startquest [name or id]. Usually, if you have done the above correctly, the quest shows complete on the quest screen.