Otto Daimler, Henry Ford, the Wright Brothers and a host of people at the turn of the 20th Century were tinkering with new technologies that were not as economical as their established competitors, nor apparently world saving, but look what investigation and experience have done to those technologies in the past 100 years or so.

3D printing is a new technology that doesn't give much today, but has the potential to make great contributions to Mankind in this coming century. Right now we are tinkering with the technology, but if you read the 3D Printing News you will see that advances are being reported on a near daily basis. 3D Printing will become useful when we have mastered the technologies involved.

Old Man Emu