I have made my flanges with arc slots and I have been always able to properly show the center marks of the holes.
But for some reason that I can't find with this flange if I make the slot with an angle of 5º I'm not being tho show them properly.
But if I make the angle of the slot 15º the drawing of the center mark is correct please see the attached files.
I attached the image of the drawing for both 5º and 15º and also the file of the flange..
Can someone help me out??