Cube 3 Filament Trick

After having come across a number of 3rd generation cube 3d printers made buy 3d systems for next to nothing. I thought to myself why not start a 3d printing business. After spending some time teaching myself how to use the printer and make 3d printable cad files. I start running out of filament. Thinking this wont be a problem I start shopping around because you need to use their proprietary filament I very quickly find out it is impossible to 3d print using the cube 3d printer and make a profit. So I spent hours trying to figure out how to hack the cartridges.