Over the last two years 3D printing stocks have been on fire. Stratasys Ltd. ( Nasdaq: SSYS ) has earned investors a two-year return of roughly 131%, while my favorite player, 3D Systems Corp. ( NYSE: DDD ) , has delivered 255% gains. I can't say I'm surprised. As I wrote last March, 3D printing is a $1 trillion dollar industry in the making. It's what's known as a "disruptive technology." And by the end of this decade, everyone from consumers to big businesses will be able to make their own unique products in just a couple of hours. There's only one problem: Aside from Stratasys and 3D Systems, there haven't been many other ways for investors to play this hot market Not only that, but the industry has gone through a consolidation as these two firms have snapped up several of the smaller players. That has left investors with very few options-until now. To continue reading, please click here...