Using branching with Question Banks

Hi eLearning Community,

Does anyone have any experience using branching with question banks in Storyline 360? Let me explain what I'm trying to do.

I want to have a series of questions where a user will watch a short process video and will be asked if the operator did the process correctly (Y/N). If the user answers N, it will take him/her to a subsequent question asking what the operator did incorrectly (with M/C answers). If the user answers Y, then the user will be asked the next question and not the part b question.

I was able to get this to work not using question banks, but I would really prefer to ask these randomly and where they get a random order of correct process videos and incorrect process videos.

I tried a couple of different methods:

1. Adding the Part A and Part B questions to the question bank and using the lock feature to lock each part B question to it's part A;

2. Adding just the Part A questions to the question bank and use triggers to direct user to the Part B question (in another scene) then back to the question bank draw;

3. I tried various applications of layers and lightboxes (and feel one of these may be the best way forward), but couldn't quite get it to work.

If anyone has any ideas, I would love to hear them. I'm attaching my .story file (Scene 1 is the process working correctly and Scene 2 has the question bank draw).

Thanks!

Lori