In order to get successful prints, you have to get the bed leveled. I find myself constantly adjusting the bed especially to compensate the thermal expansion of the heat bed.This nut lock attachment is designed for PB+ (maybe LC too), giving users the ability to level the print bed easily regardless of glass size and thickness.Those using corner tabs mods may not be suitable for this mod. I prefer the binder clip method since I can easily install insulation under the heat bed.Designed in Solidworks 2009. I can upload the DXF file so someone can redraw it on a different CAD program.Working on a knob for the nut under the heat bed to make adjusting easier.