How 3-D Printers Work

Hate to be a nit picker but the guy using the cresent wrench had it on the nut backwards. Cresent wrenches are made to be used with the part that slides back and forth on the side that you are moving to. Kind of like you use a pipe wrench in the same way, it helps it lock in to the nut when torquing.
LOL! I would have never brought up something so silly except for that I just went over the same thing with my 16 y.o. nephew. This is the same nephew that several years ago was playing with a 1/4" ratchet with a long extension and when he started spinning it around, the ratchet came off the extension and hit me in the head while I was in the floorboard of a truck working under the dash. A few months later, he started to do the same thing with a 1/2" drive ratchet. Im sure he still has the dirty look I gave him 3-D printed in his mind to this day.