never had this problem before because it was just a matter of selecting the hole diameter of one object and mating it with another hole and they would both match up bang on. however i cant seem to do it this time because the cad model i downloaded the holes are split into 2 pieces as shown in the pic, so when i am mating and i select 1 half of the hole it doesn't align up with my plate holes.

any tips please?

thanks

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Click image for larger version.  Name: hole2.jpg  Views: 120  Size: 21.8 KB  ID: 30442