Best suggestion, check with Tormach, P/N 31706 Power Draw Bar Kit, $1,193.50 and you'll also want the foot pedal kit P/N 31728 for $68.45.
I bought them both when I bought my machine, and now, I wouldn't be without them.
The ATC came along 3 or 4 months after I got my machine. There were a few times when the ATC would have been a good thing to have but most of what I do requires short cycle times, so I have to stay at the machine anyway. Right now, I don't have the ATC, and I don't miss it.