We have two different stainless steel bowls. One is a stainless steel bowl with a center column. One is a bottom drive stainless steel bowl (used for challah) with no center column. Both of the bowls are on Nutrimill.com
“Love the look, but after making a large batch of high hydration dough, there was a lot of dough down in the shaft, wish I had bought the bottom mixer. cost more but probably worth it...”