If I'm not going mad, there's something amiss with part 2907 in the library.
Check out the Rebrickable entry—all the images there, even their rendering of the LDraw part, show the grooves rotated 22.5° from where they are in the actual library part. Did this get changed during some update? Is there a different version of the part somewhere else?
From the photo, it's clear that the grooves, not the fins, should be at the 8 compass points.
Check out the Rebrickable entry—all the images there, even their rendering of the LDraw part, show the grooves rotated 22.5° from where they are in the actual library part. Did this get changed during some update? Is there a different version of the part somewhere else?
From the photo, it's clear that the grooves, not the fins, should be at the 8 compass points.