Well, I experienced it quite alot in college you know manual etching process. We have to color the boards with permanent markers before dipping it to the copper solution which is very very tedious and a few times still inaccurate especially to more complex circuits. I believe this product you brought to us is very innovative, aside from the current digital printers available voltera will further enhance the accuracy of the printed PCB's which is very essential in all projects. Thank you very much for sharing such a nice product! :)