I have created a part which has 3 holes. I would want to secure these holes with cotter pins. How do i do it? I tried using the iMate function, but i couldnt get the imates of the cotter pin to match iMate of the holes. I tried doing a custom iMate for the holes but i couldnt get it to work. I tried the component generator too, but it only adds the iMate to one of the holes.