I need to press new wheel studs into a cast iron hub. I need to drill the existing hole larger, but what size to use is the question. The new stud (different than the original studs) has a knurl with 0.623" OD, so what size drill would be recommended? How much press fit undersize is the norm? The Dorman page of the catalog I found the stud on didn't have any recommendations. My buddy with the mill who will drill the holes says he commonly uses a hammer to remove and replace the studs in the stock car axles he works on. But I thought maybe something more like a light press would be appropriate. What do you experts recommend?