Wanhao Duplicator i3 v2.1I am asking because I cannot figure out why my bed is way off in some areas and not in others. My heated bed is warped like a bowl. The corners are higher than the space surrounding the center, left and right areas. The front and back are not as bent and stay mostly level with their corresponding corners. These symptoms are similar to that of y-rods being bent downwards, but I have concluded this is not the case by turning them 180 degrees and trying many other orientations. I have glass a top of my bed and am using thermal pads to hold it in place and transfer heat. I have noticed that some corners lift off from the bed and pull the thermal pads with them, making leveling inaccurate and hard as it changes its height and resettles. Is there any way to get around this? Thanks TLDR: Bed will not level, the heated bed is bent/bowed like a bowl, and the glass pulls the thermal pads up and off it when trying to level. http://ift.tt/2fgIaYi