Take a look at this cheap handlebar joystick/remote I found on eBay. It can zoom and pan a map in eg Viewranger and scroll a roadbook in pdf(on a Nvidia Shield K1 android tablet). However, with a remote for the tripmaster as well on the handlebar (not mounted in the video), the left side is getting way to cluttered and it needs a better overall solution. Also, the joystick (https://tinyurl.com/y8blchw2) is a cheap plastic non waterproof and sure to fail device, even though the roadbook rallies I sometimes participate in are lightweight. So the question is, where can one buy parts (switches, joystick) for a diy controller which should incorporate tripmaster, joystick/remote, turn signal, high/low beam, etc? Question number two, anyone done this before? Must be.