Center is found, no picture but I then use the tail stock to make sure all is lined up correctly because I like to use the tail stock with a jacobs chuck to do the drilling
After choosing the size pivot rod I want, I select a bit just at the same size as the rod (sometimes even a smidgen smaller) depending on the hardness of the steel and size of the arbor, then select a bit a size smaller than that. The first hole is at least 3 times the size of the pivot in depth, use the smallest drill bit first
The next size is used to drill at least 1 times the pivot size in depth, this will create a stepped hole