This may or may not be of use in this thread but for typist it is recommended that your forearm be parallel with the floor to aide in preventing carpal tunnel syndrome.
Kodak recommended that all editing benches have the equipment spread out on shelves and such to keep your neck and shoulders moving so as to avoid neck stress. Condensing everything right in front of your face for long periods of time results in sore necks.
When seated at a workbench and you have to continually stoop over for small work, back pain can be eliminated or reduced significantly by keeping your thighs parallel with the floor by elevating your with a footrest not under the seat but in front of the seat. The legs are allowed to offer considerable relief to back muscles.
I am 6' and my lathe is stock SouthBend. My back gets tired if working long periods as it seems low but I don't want the chips any closer to my face.
I bought the factory cabinet for my Rung Foo mill and ended up setting it on 4 cement blocks as it was killing my back. Now I use it seated on a roll-around stool and it's not too bad.
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Thank you to our families of soldiers, many of whom have given so much more then the rest of us for the Freedom we enjoy.
It is true, there is nothing free about freedom, don't be so quick to give it away.