I'm building a mouse for my computer to control my robot. Everything on my project needs to be homemade and I really need any suggestions such as: where to order parts from, what type of mouse would be best to use (trackball, laser, LED). I'm thinking I'd want to use a laser, but I'm not sure. I'm making the shell out of SolidWorks, printing it out on a 3D printer, then installing the components inside by myself. Any ideas/help would be greatly appreciated. (**I have no knowledge or experience building things such as this.)