[HELP] Centering on a rotary table

[PixMan]

On my rotary table there's a Ø 1.000" bore at the center. I made a plug that fit into that to near it's bottom. A shoulder on the turned plug was made to fit the mating part that I wanted centered on the rotary table. Done, slip the plug into the bore, tram with a dial test indicator to know where X-Y zero is set, slip the part to be machined over it and go.