The device assembly process (a) parts required for assembly, (b) cleaning of the PMMA clamping jigs, (c) assembly of the bottom half, (d) punching of inlet and outlet fluid ports, (e) placement of the top jig onto the PDMS using tubes for alignment, (f) placement of the centre PDMS, (g) positioning of the top and bottom assemblies, and (h) final tightening of the assembly.