Superlight Gridfinity case with half size lid

This is a version of the excellent lightweight gridfinity case with a half sized gridfinity grid, so you can use half-size boxes with it. The base does not need to be half-size, because then it will fit both half size and regular gridfinity elements.I did not care for the grid on the top of the box (and the half size grid created gaps in it) so filled that in completely.