Welcome Flow Logic Question

Hello,

I revamping our welcome flow and want an extra set of eyes to confirm that I am doing this right. The idea is to build THREE separate email streams for the following segments:

1. (STREAM #1) New Email Leads who signed up but have never purchased before
   1. I want this group to exit the flow if they have made a purchase since starting the flow.
2. (STREAM #2) New Email Leads who signed up during a purchase @ checkout
   1. I do not want this group to get our Welcome Series at all, because they will be routed to our “Thank You” flow & I don’t want them to get both.
3. (STREAM #3) New Email Leads who have signed up but have purchased before
   1. I want this group to exit the flow if they have made a purchase since starting the flow.

This is what I have so far: (Please ignore the content (They are just placeholders)