Branch logic for multi-choice question

Hey Typeformers, I’ve read what feels like 50 posts about this, and I’m still feeling stuck. What I want to do is pretty simple, and what I’m digging up appears to be quite complex. 

It looks like @john.desborough is the pro in this area, so maybe he can dumb it down for a Typeform newbie :) Here’s the deal:

• Q1: 6 options (select as many as you like) 
• 3 answers have 1 follow up question 
• 3 answers have none 
• I have the brand logic set if you select all 3 of of the options that require a follow up question, but I can’t crack the code if you select just 2, or 1 and 1 (or 3) of the options with no follow up questions. 
• I’ve read and experimented with the “question grouping” structure, but still getting stuck. If there are any videos out there that show this particular use case, that’d be awesome! 

Thanks in advance for any help!