As an aside, I really don't know why people get so excited about 3D printing to the exclusion of all other manufacturing methods. Lego blocks could easily be made to the accuracy required on a milling machine using technology that's 100 years old. And it would be much faster than printing.
3D printing is certainly useful, but it gets way too much press. About the only reason I can think of is that it's easier to DIY a RepRap than a CNC milling machine due to the much smaller forces required.
3d printing in this case would be faster than manually using a milling machine. cnc could work though. I thought it would be more of a "this is clever" though i can't imagine charging more than $1-2/block and no clue if anyone would pay that. I haven't bought a lego in 20 years.
As an aside, I really don't know why people get so excited about 3D printing to the exclusion of all other manufacturing methods. Lego blocks could easily be made to the accuracy required on a milling machine using technology that's 100 years old. And it would be much faster than printing.
3D printing is certainly useful, but it gets way too much press. About the only reason I can think of is that it's easier to DIY a RepRap than a CNC milling machine due to the much smaller forces required.