Need help understanding how to add a quest (chain) to a pre-existing N

[KHShadowrunner]

So, I'm giving my first shot at modding and my inspiration is to make a continuation of the Theives Guild quest line. I see too much potential to at least let me and my wife have a lot more fun with it (if we so want). Since there is a tutorial on this I figured I'd go through it and simply try to replace the steps where the tutorial suggests creating a new NPC and instead simply referencing Brynjolf, which I have done. What I'm having trouble understanding is how to tie a new quest dialogue in when the NPC is already set on another quest tier.

 

After digging, I've found that Brynjolf's dialog is tied to quest TGPost. I've created a whole new quest, and assigned the dialog option that starts it to the correct GetIsID to the correct NPC, the GetStage < 10 for this quest (so it does not repeat when I actually start the quest, and a third condition to confirm that I am actually at the proper point to move forward (I've tried GetStageComplete TGLeadership, GetStage TGLeadership == 200, GetStage TGPost == 110)

 

But no matter what I try, Brynjolf's dialog is only set to the dialog options in TGPost. Is there anything else I need to do in order to tie the dialogue to it? Or, do I have to actually add the dialog into TGPost and once that's done update my quest to stage 10?

[KHShadowrunner]

I found the solution, which was that in 1.7 they have an issue that requires that you create the SEQ file. Seems I fail to read up on things :). But! now it's working so I can continue to have more fun.