What is The 3D printer Size for Robot Kit And Printed AR3

Hi,

Thanks of this open source project, I have question regarding what kind of printer size needed for

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Full 3D Printed AR3 (no purchase aluminium part)

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AR3 combo set (most of the structure using aluminium part)

I may have some friend feel interested on build own robot too, it is better specific the size in manual too to avoid people purchase wrong printer.