This Review Title is Not designed for left handed hobbiests and the content is: The instructions that came with this 3D pen are clear and easy to follow.  I was up and running right away, and right away I ran into a problem.  I would set the speed of the flow to slow, but almost immediately, that would change to fast flow.  Turns out that when using the pen with my left hand, my thumb was against the button that changed the flow.<br /><br />Fortunately I am ambidextrous and had no more troubles with the speed changing..There are other information for this review, one is This reviewer did purchase it and the other is 1 people think this review is helpful.