[vVigglEs]

I think this could clear up what Eric was asking

We will be putting holes through a control board. We want each of are parts on the control board to have a bolt pattern and wire patter. This is how we could easily find if there's space for the holes of diffrent parts. example; partA has 5 hole around it that pass through the control board, where wires will go through, we want to be able to see how much room we have to add a partB with its own holes. Also, using this could save time, if partA is used 5 times we don't want to have to repeat the hole cut over and over.
How could this be Done?

If the holes were applyed on a 2D sketch with in the Part, then in the assembly could we apply the extrusion through the board? How?