hi guys im looking at getting a Tormach 1100 with ATC and had a interesting talk with a guy using the TTS (without ATC). he was machining aluminium and steel and was saying you had to really swing on your spanner when attaching to the mill as he has had tools come loose when taking big cuts or using bigger than 10mm cutters in steel. has any one else had this issue? does the power draw bar do tools up enough to prevent this? is the ATC and TTS strong and rigid enough to use on steel and confidently or is it better to just change tools by hand and swing on the spanners?