Hi MaximumL,
There's one missing piece to the discussion here:
WHY you actually fell short on test day?
Most of the time, when practice test scores are higher than test day performance, it's Test Taking Skills and Strategy.
There's a big difference on Test Day. Everyone is waiting for your score (especially those who have sacrificed time with you so you could study). The importance of the real test. The different feeling of the Testing Center or the online testing experience with the proctor and restrictions. They all create an element of distraction for your brain -- so you're taking the test with less brain power available than at any other time.
So what's the antidote? it's stronger Test Taking Strategy. If you're more complete with your approach to each question, you'll insulate your brain against the distractions and still hit your maximum potential. The good news with Testing Taking Skill gaps: They're much easier to fix and requires a week or two max of additional prep. As long as you know what to focus on.
Happy to discuss further -- there are ways to figure out exactly what your gaps are.