The printed hinged tie down needs 2mm more clearance between the base center hole and the inside vertical wall (at least for the 500 printer). The existing print does not provide adequate clearance and as a result the lower 3030 rail of the lid assembly must be moved outward 4mm (2 mm for front and back tie down clearance). I have attached a step and stl file which corrects the model by making the base 2mm longer than the existing design
enc_lid_hinged_tiedown.zip