Aliexpress.com : Buy Milling006# cast iron frame for metal Milling CNC machine,metal engraving machine, 3 axis,300X400X120mm DIY mach3 from Reliable frame heart suppliers on JiaLing FeiLong Automation Equipments Co. LTD.

so i as looking for skyfire's atc spindle and from the same seller, I found this little guy. 300x400mm travel, the footprint of a small router, and a fairly heavy cast iron construction.

seems to come as you see in the pic attached from $2400, with rails and screws of average quality.

other than I know nothing, haven't contacted the seller, do not even know if they are trustworthy. I just thought id share the find, and see what people thought. in my mind I can see turning this into something quite cool for a fairly low cost. I especially like the travels, which are much bigger than a regular mill.

the Z looks like the weak spot in it, almost looks aluminium, but the pics are pretty bad so maybe looks are deceiving.