keymouse

Thanks for posting the link. LTT definitely made a cool video!

Thank you! There are some possible options out there for 2 mouse cursors, you can see here: https://www.keymouse.com/resources, but not sure how well they work. Also, we are considering making a product that will allow 2 mouse sensors in the same device (trackball and bottom mouse sensor).

Thank you! The AdvantageII and Ergodox are definitely good keyboards. We just went the next step and added the mouse built in, so you don't have to move your hands of the keyboard to use the mouse.

You mentioned that the keys are too noisy for mechanical keyboards, but have you tried Cherry Silent Red switches? Here's a video that explains the Cherry MX mechanical switches: https://www.youtube.com/watch?v=zlSPH3HvxhQ

Yes, single inventor (programmer of 25+ years now). Started a Kickstarter campaign, but ended up changing to a 3D printed modular system, rather than going injection mold route. Gave us the flexibility to improve our design without high costs, but also allowed us to create a modular system, so anyone can use our parts to build their own devices.

(edited) Actually, no. For chair mount options, the ChairTrack just allows the device to sit over an armrest. Both Track and ChairTrack have chair mount options, but no brackets are included with the devices.

KeyMouse is also fully programmable (including the mouse motion and scroll/trackball), and like the Ergodox, you can place each hand in whatever is the most comfortable position, but you don't have to move your hands off the keyboard to use the mouse.