I finished the Arrow of Extrication quest, and I've got over 8000 gold fenced, been using the dude in Anvil castle for my fence(haven't been able to find Fathis in the Imperial city), and I wanting/needing the next quest to engage. Do I still need to get more items fenced or could it be that I've got too many mods running?? I've got like 15 or more mods engaged. Could that be preventing the next portion of the Theives guild to kick in??? Or could it be something else? I don't reckon I HAVE to use Fathis for my fence, do I??

No, you don't have to use Fathis (but you'll find him in the market district in one of the alleways if you want him) and you've got PLENTY of fenced gold. Sometimes it is merely a matter of a waiting period.

I went to the Imperial City Market District and hung out until the TG NPC found me. It works quicker if you wait there. If it doesn't happen within a few minutes, then use the Wait function to advance the time 24 hours. But staying in IC is your best bet. I've read where NPCs that go looking for you elsewhere will walk from place to place after you, retracing your route. So all the more reason to stay in IC.

there's a easier thing to do! type " ` SetStage TG10Boots 10"