According to the old design, for the alignment of the Blade to be proper, the faces of the triangular plate base and the blade hinge plate need to be machined, which is not possible. If not machined, then the blade will not be completely straight, because of misalignment in the blade hinge plate and the blade might cease to swing.
In our new design, we will check the design of the two independent arms in FEA and ensure that the blade gets a solid support. 
