So the build documentation says to remove the upper coupler grub screws before putting the couplers on, but it never mentions to put these back. These two posts seem to imply that I'm not supposed to put them back: http://forum.e3d-online.com/index.p...axis-rods-am-i-going-nuts-here.898/#post-7092 http://forum.e3d-online.com/index.php?threads/is-my-lead-screw-bent.832/#post-6375 So I'm pretty confused. I hadn't noticed after commissioning that I still had these two grub screws left over. I've done a couple of pretty nice prints that way. One thing I noticed that seems a bit different is that if I put the grub screws in and tighten them and then manually turn one of the Z screws, both Z screws will turn. I'm pretty sure this wasn't happening before the grub screws were in. Are these supposed to be in or not?