Hi there and thank you for taking time to read this. I have a pair of electronic marine speedometers (paddle wheel) that I'd like to convert to GPS. I'm keeping the original gauges, but the plug-n-play conversion kits I've seen on the market are way too expensive. I see all kinds of gps modules and other peripherals online and wonder if they can be combined to drive an electronic analog speedometer; or is not that simple and requires advanced knowledge? I have zero expertise in electronics so forgive me if it's a ridiculous question Thanks !