Hi Muzzer
I do have a milling vice. But holding the round bar between flat faces didnt seem as secure as the tool holder.
I didnt use the tee slot because I wanted to access all of the end of the bar without hitting the edge of the slot.
The QCTP holder was very easy to set up too – I posted because I thought that this was a good solution to the job that I had on hand and that others might consider it as an arrow in their quiver.