Could you detail out the Pen lift attachment. I see the printed parts but not any instructions. Just simple pics would be helpful for now. I was thinking that one of the main uses for this unit would be to allow my kids to plop it down and pick from a preset groups of designs and have it draw it out for them. I down think putting a laser in front of them would be wise.
Please let me know the needed parts. I see that a micro servo is needed but I am not sure what rails and slides that you intended to use.