I'm not saying that the other poster is necessarily wrong, but I just took CRDTS as well and that is definitely NOT how my modification request denials were handled.
When the other poster says denied on the same mod, I'm not sure if they mean same mod as in asking to remove decalcification on the same tooth in the same location more than once, or the same mod as in requesting any removal of decalcification regardless of tooth or location.
I was denied two mod requests to remove decalcification. One on the class 2 and the other on the class 3. I had a two point penalty deduction off of the overall restorative section score, so I would guess that each denial resulted in a 1 point penalty.
My experience with the exam was also very different. The CFEs were awesome and very friendly and helpful. They tried to keep us as calm as possible and everything went smoothly. I think there were around 40 of us that took it and we had a 100% pass rate.
If you haven't already tested, just try to stay calm during the test. If your school is saying you're qualified to take the test then you obviously know what you are doing and are more than capable of passing. You just have to beat the mental game and manage your stress. Good luck!