On the offchance that someone has a Sieg X1 micro mill with the small table, I just upgraded mine to the larger version (from 240mm to 400mm). Pictures and blurb at...
Haven't used the new table in anger yet, but everything feels okay, if a little tight and stiff. I'll give some time to bed in and then see if anything needs adjusting. The main difference I'm hoping for is the ability to clamp larger jobs - the small table runs out of room if you assume 2" at each end for clamps, while the new one has bags of room left over. It'll also let me try my rotary table vertically with its tailstock.