Tearing your CX3 down to inspect its shafts is a final step to check for bent shafts. You can remove the upper blades, check for vibration, and then the lower blades and again check for vibration as interim tests for bent bits. If something seems to be shaking, continure taking things apart to examine the shafts. The best test for bent inner or outer shafts would be to roll the shaft along a very flat surface such as a piece of stone threshold or your kitchen counter. The rotor head or gear has to stick out beyond the edge of the flat surface to permit this test. You will see the shaft lift off of the flat surface as it rolls past the bend. A stock metal flybar can bend into an S shape in a crash. This can cause toilet bowl. Sight along the flybar to see if it is bent. Check the flybar and linkage for binding as another cause of toilet bowl.