Chuckie,
I am surprised that you said the "salt" test is one of the most tricky tests. Are you using the Taylor K-1766 drop test? With that drop test, the solution turns from white to a salmon color when done. No guessing at all. I would consider the salt test one, if not the easiest to perform.
Now I do agree with you on the CYA test. It definitely is the most tricky of the Taylor tests. When something depends on the outside light, viewing height and angle, and the tester's opinion, it is definitely a "tricky" test.
My adventures with the pool store is in the fact that I am required to have a Pool store test my water to meet my warranty requirements. However following the Pool Store's recommendations is NOT a requirement of my warranty.