Yes. Someone on the youtube site suggested using a rotary table too. The small R/T is still in pieces and the big one is a 30kg 8" version - I feel a little silly getting that set up for a 5/8" diameter hole.
I did think of drilling a hole and then welding up a little so I could make the flats (it's 13.5 A/F, so 1.25mm/ 50 thou per side)
Michael