It should be nowhere near that price. I run a small business laser cutting parts for Model Engineers, I cut out the two y axis end plates in 5mm Aluminium for £7 each, The acrylic cracked. I also made some 1mm shims in steel as the ground steel bars were too long for the aluminium extrusion. At the moment I cannot get the Z axis to zero consistently, looks like the bed is not parallel to theby Laser Mal - Ormerod