+1 on the left-handed trackball and right-handed vertical mouse. I don't use both together, though. My trackball is a Kensington Orbit, with scroll ring. I als

+1 on the left-handed trackball and right-handed vertical mouse. I don't use both together, though. My trackball is a Kensington Orbit, with scroll ring. I also have a cheap graphics tables, a Huion, for some digital painting or to help with creating software architecture diagrams.