Jim Scott is a great guy. He taught at CCBC for awhile, last I heard he retired a couple years ago.I had to go take it at the NWS office in Pittsburgh. Serious PITA. I had a GREAT instructor to learn LAWRS with though (Jim Scott).
When I got to my first duty station 20 years ago (!) I became the guy to sit in the CBI room while newbies took their tests.
I’d say try to be generally familiar with observations, and if the test is similar, try to know the anomalies. There used to be a lot of questions about them.
I suspect you will be fine. Good luck and let us know how you do!