The original Ultimaker files are here: https://www.youmagine.com/designs/hand-drill. I have no affiliation to Ultimaker, all edits were completed under the creative commons licence originally specified. The drill has had pockets added to allow mass to be added in an effort to allow manipulation of the drill's mass properties post-fabrication. The drill should be printed using the same settings as in the Ultimaker post. Have successfully printed these parts on an Ultimaker 3 extended using Ultimaker PLA.