I canīt imagine a limit for development in this area. Suppose we will soon share in a email some airplane/landing gear/engine design etc.. and then we are going to print the stuff we like in a local printing shop, and probably the same for tools, cars, (some will want to print a flying one, haha) etc..and this is already amazing. And inevitably, probably at the critical point in wich a highly capable machine will be able to copy itself, everything we knew about how to earn a living will change.

Harry, very cool, I also read somewhere that Lockheed Martin is printing complete assembled airplane modules, including electronics/mechanisms/structural parts that "glued" together make a operational aircraft.. and with a incredible strenght to weight ratio, as this modules can be printed in a way that would be impossible to assemble with nut and bolts.. I bet the engineers at the skunk works print their own smartphones in that printer in their spare time...

Jose, you and the guys at SJRP are the best, hope to make the long drive there as soon as I can, and hope you will be able to visit us too!

p.s. maybe you can print a caller like this one.. it is perfect because it is quiet and has a gifted eyesight!