I am curious if anyone has a good solution to the following...

We are using the new slot option in the Hole Wizard.  This places a centerline in the slot which is useful for placing centered hardware.  It would greatly improve productivity if we could get the mate references in the fastener library to recognize this centerlline.  Currently the  mate references only recognize the two cylindrical surfaces at either end of the slot.

Anyone have a good way to do this with the least number of clicks?

Thanks,

Jake