Cost-Optimized CNC Assembly Redesign

I want to re-engineer an existing plate-clamping assembly so it can be produced on a CNC mill as cheaply as possible while still working every time. The moving mechanism and other machined components must... (Budget: $30 - $250 USD, Jobs: 2D Drafting, 3D CAD, CAD/CAM, CNC, Manufacturing Design, Mechanical Design, Product Design, Solidworks)