When I do the family heirloom quest for Skior, it crashes when I try to give it to him. I have tried to use the console, but it still crashes after I set the stage to 200 and close the console. I am using ESF Companions if that helps.

Any Ideas anyone?

That's from the mods author:

I can't get one of the Companions quests to work!

Because this mod encompasses the whole Companions questline, it's tempting to see it as the cause of any problems with that questline; but the reality is that the vanilla questline has many bugs, and most issues people report have nothing to do with this mod.

That doesn't mean this mod is perfect--see below--but before reporting a problem

1) consult the uesp.net page for the quest you're having trouble with to see if your problem is a known bug, and if there is a known solution

2) use the Unofficial Skyrim Patch, it fixes many bugs and is updated more frequently than this mod

and

3) be wary of mods that add fast-travel markers to Whiterun (never fast-travel directly to Jorrvaskr to conclude a quest), or make other edits to the city, because many Companions quests require passing through a certain trigger or location-change.

I've never had problems with fast-traveling to Dragonsreach on my way back from quests during testing, but if that doesn't work and you must fast travel, go to the Stables outside town and then run the rest of the way back.

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if your crash is related to that mod, and because that's a radiant quest, reload a previous save, and obviously you get another quest from Skjor, in a different location.

If you have the attention to disable or even uninstall that mod, most probably this will not work.

Bethesda's official stance is that uninstalling mods is not possible with Skyrim. This is because information from a loaded mod is permanently added into any saved games made with that mod loaded, and persists thereafter.

Make sure you keep a save game from before you installed this mod, that you can revert to in case of any problems or dissatisfaction.

(That's from the author of this mod too)