A double-sampled feedback integrator system includes a sampling module having multiple switched capacitors. An image-stitching software program may then produce a cohesive combined panorama image from the adjacent frames of image data by utilizing the manipulated image parameters. Also disclosed is a method of reducing aerodynamic drag on a wheel. The cartridge has a cartridge depth that is sized to be complementary to the shelf depth such that the cartridge may be retained by the lip when the cartridge is stored on the shelf.