Rob,-
Seem there are lots of variations on this style of bench mill. Thanks for the pictures.
Here is my setup and the speed chart. The 3000 top end is useful for small drills and end mills.
Got tired of flipping the top cover up so removed it and put a shorty safety guard at the front.
By the way, you mentioned column size in your writeup, checked mine and it is a little over 4.5".
Canuck75