Also, since solder can't handle large loads (it would simply melt at some point,) PCB milling looks like another approach and also somewhat worked on in RepRap

Also, since solder can't handle large loads (it would simply melt at some point,) PCB milling looks like another approach and also somewhat worked on in RepRap community - http://reprap.org/wiki/PCB_Milling http://reprap.org/wiki/PCB_Milling