You just reminded me to post in this new community I joined recently, so thank you.

They must be referring to the full stream, maybe this one? https://www.youtube.com/watch?v=Tc3_EO6Bj2M

I think Elecoms are prone to sticktion. I have an Elecom Huge and I had to replace the bearings to make it smoother. None of my other trackballs have that much sticktion, my Kensington Slimblade in particular is buttery smooth.

I use a split keyboard and trackball at work, and I thoroughly enjoy the bafflement of my coworkers when they try to use my computer.