.187 is NOT the same as .1875 or .1865 or .1873!! And when you have two differently sized holes selecting a large one with a + selection tolerance will not find the smaller ones. But if you select a smaller one it may find the larger ones. Naturally these may be selected as multiple sets ...
"Mask on arc" works just fine for the non-clueless. And nobody that does not know simple things such as
1875 > 1873 has any business pretending to be a programmer of any sort.