This is probably easy for someone but it has stumped me. In the attached parts I have a red part and a blue part. I want to let the red part's holes drive the hole locations of the blue part. The blue part will need to be counterbored from the opposite side as the red part. When placing my holes I am unable to get a coincident relation from the red part to link the two holes. I can do this if the holes are on the same plane but since I need to counterbore the holes I have to work from the opposite side and this seems to create the problem. Thanks for any help.