So my buddy installed a Kirban unit and problem solved. Clearly, the following can be concluded:
1-Accufab doesn't give a crap about their product, reputation, or customer perception.
2-Accufab changed the design to save cost. It still does not work. Still crap.
3-Purchasing parts from known and respected Buick vendors means nothing.
4-YOU, as the end user, still have to inspect every new part, and never take your passion and pride in the work YOU do and expect for granted.
There is way too much of this going on and I am in the process of developing a process to correct some quality issues.
Google search terms:
Accufab fuel pressure regulator fpr fail junk leaking not holding pressure