I have a custom elbow that has an angle of 89° in the tube and pipe author dialog but I cannot select it in the tube and pipe style in the "elbow custom" field where the filter properties are 45° to 90°. I can select it as the standard elbow though where the filter properties are 90° to 90°. This doesn't make any sense. All the other filter properties (grayed out) are the same.
Any ideas gratefully received.