Comment by donatj

I have purchased a bunch of trackballs, trying to find the best one for me. The Kensington Expert is as you describe, but maybe not quite to my liking. If I did graphic design work, it'd be the one I want for sure - the level of granularity is great.

For my money (clicking with thumb/pinky, using ball and scroll wheel with index and middle fingers) the Kensington Orbit is my daily driver. I even use it for shooter games, since I'm much more accustomed to trackballs these days than mice. As an added bonus, it seems a lot easier on my tendons than a mouse.

I bought a Logitech MX Ergo a couple of years back and genuinely love it for many of the reasons other trackballs users cite in this thread - but I have noticed in the last few months that my thumb joint will get 'stuck' and makes a click when I unstick it. Definitely related to the MX Ergo and the thumb navigation like you say. I'm an older gentleman which likely contributes.

So might be tempted by an all finger alternative - at the moment I'm attempting to up my use of a terminal window manager to minimise pointer use

I'm prone to RSI, and I started using a logitech trackman in '99 or '00. I've occasionally had periods of using mice or trackpads, and extended use of either causes flareups. I've never had flareups with a thumb ball, even with pointer-intensive use like CAD, FPS and graphics. So I keep returning to them -- I've been using them more or less continually for around 25 years. So for my body, it's a clear win on ergonomics; ymmv.

This is the only “Trackball Mouse” I know of: https://commons.wikimedia.org/wiki/File:Apple_Mighty_Mouse_W...

It's a pretty small trackball.

> Just using your thumb for all navigation seems like an RSI waiting to happen.

I have a thumb trackball. It's been a blessing to my RSI. I can fully rest my hand and fingers on it. With a central ball, I need to keep tension on my fingers otherwise they roll on the ball and move the cursor. That seems like an RSI waiting to happen.

I agree. I actually almost bought a trackball, thinking it was a mouse that also had a trackball in it, because of this misleading naming.

Indeed I have a ploopy 1 on the drawer because it gives me strong RSI on the thumb.

L-Trac is still in production, made by P.I. Engineering, "The No Slogan Company"

I'm working on an open source one for myself: https://github.com/ginkgo/trackball

Next step is adding QMK support.