CBP exam format — how many questions and what's the actual passing score?

I've been in residential construction for 11 years and my company is pushing us to get the Certified Builder Professional credential. I registered for the exam last month but I'm having a hard time finding solid details about the format. The NAHB site is vague and the study material I bought doesn't spell out the exact passing threshold anywhere obvious.

From what I've gathered from a few older forum posts, the exam has around 150 questions and you need roughly 70% to pass. That's 105 correct out of 150. I've been scoring between 68% and 74% on practice sets, so I'm right on the edge and it's making me nervous. My mock exam last week came in at 71%, which didn't exactly give me confidence going into the final stretch.

I've been studying about 90 minutes a day for 6 weeks, focusing heavily on project management and the financial sections because those are my weakest areas. The construction process content I can do in my sleep after a decade in the field, but cost estimating and contract law trip me up constantly. I keep mixing up the lien waiver types and getting the wrong answer on those questions.

My exam is in 3 weeks. Should I keep grinding practice questions or switch to reviewing the NAHB reference manual more carefully? I feel like I know what I don't know but I'm not sure practice sets are hitting those weak spots hard enough.