Nice. I like your improvements, especially the connection method to the bed rail. And I agree, there is nothing good about the ribbon cable, it's a disaster to try to gracefully route it anywhere. This setup was really just a quick temporary solution, and I'll be ditching it for a completely new design soon. I plan to convert the ribbon cable to a round shielded cable that can be easily routed and hidden, and ditch the single mount point arm for an adjustable accessory rail. I'll post something once I have a working design.