Clamps and magic arms from Amazon UK:
This has been extremely helpful in eliminating the ulnar nerve problems I was having in my left arm. I’m still not as fast with the trackball as the mouse.
I wish I could manage to tweak the mousekeys controls on the M01 but at the moment it seems I can either use Chrysalis for my key mapping and colours, or change the mouse keys by starting with the latest firmware and flashing with Arduino. Lack of knowledge on my part, I’m sure.
Anyway, a better mouse keys setup would make this ergonomically pretty much perfect, for me at least.