Hey guys just wanted to give you all a heads up reminder to check those nuts and bolts for tightness. Some of the nuts and bolts on the Robo should probably have had some kind of locktite put on them for added security. Motor mounting screws are good candidates for this.others are anything that is on a moving platform or moving itself. The one exception is the z axis nuts on the threaded rods do not secure these it is very important they remain free to move. I am saying this because after starting a normal print (16 of my cable chain links) last night and seeing that it was a lengthy print I knew it would be finished early this morning but I awoke during the night and saw the time and said hmmm I do not hear the printer and knew it should still be going so I got up and went in and checked and both screws holding the extruder assembly onto the x axis sled had come completely out one screw had even fallen out and had fallen behind the printer the rear bolt was hanging on but was completely unscrewed from the nut in the recess of the extruder assembly. The only thing holding the extruder on was the hot end assembly that passes through the x axis sled, but the entire extruder assembly could be lifted up off the x axis sled until stopped by the hot end. These nuts and bolts are prime examples of ones that probably should have had some locktite on them. It is probably critical that many of us doing smaller prints especially things like calibration cubes and small things that require lots of x and y movements to be especially vigilant for this due to the fact that these small movements to induce a sort of slow vibration that can work things loose. So until you can go in and add some locktite to some of these nuts and bolts just be on the look out.