An 8" rotary table seems awfully large for a mini-mill, even in the horizontal position.? The x-y table? is only about 4" wide, so an 8" rotary would limit the y-axis motion of the mill severely, and the height (& weight) would be quite cumbersome.? I would go no larger than a?5" rotary table, and a 4" is probably the most useful on a mini-mill.
That said, if you have or are panning on obtaining a larger mill, then the 8" would be an excellent addition, especially with a dividing plate.
ralphie
Ralph Lehotsky