Sieg Super X3 Mill Enthusiasts' Site. Welcome to the website. This website is an enthusiast's point of view of the Sieg Industries' Super X3 Mill and X3 Mill. You may already be familiar with Sieg's line of homeshop benchtop style machines such as the X1 MicroMill, X2 MiniMill, X3 Small Mill and now the Super X3 Small Mill with the rotating and tapping head. THE LAY OF THE LAND ...