I've found the "vertical" Kensington to be a nice upgrade for my wrist over the Logitech 570: https://www.kensington.com/p/products/electronic-control-solutions

I've found the "vertical" Kensington to be a nice upgrade for my wrist over the Logitech 570: https://www.kensington.com/p/products/electronic-control-solutions/trackball-products/pro-fit-ergo-vertical-wireless-trackball2-3/ https://www.kensington.com/p/products/electronic-control-sol...