Thanks for this thread, Skyfire.
I am in the middle of putting together a somewhat similar mill. A bit heavier, 170 pounds base casting and 170 pounds for vertical column. I did go with lost foam casting, so surface is not as nice as yours, still need to machine it. Gray iron casting prices here in Canada are also a bit different... For a total of 480 pounds (a bit over 200 kilos) I had to pay $1100
A couple of questions: How much did you pay for those bellows? Who is the manufacturer? Are they English-speaking?
Also, I remember reading somewhere that it is better to mount air cylinder in reverse direction, but maybe I am wrong.
Thank you,
Alex