Hi guys - I have quite a few small diameter holes to show in a fairly small area. I would like to put marker points in the holes to show the centers but the markers also show outside the hole diameters. These marks outside the hole diameter get very distracting with a lot of holes close together. I could sure use some suggestions on how I could put a marker in the holes w/o going outside also. I sure appreciate all you kind folks willing to help us iggerant folks.