Giant trackball

from blog Asylum Archives, | ↗ original
Just saw a video of a giant trackball, and I started to wonder if it would make sense for me to build one. Clicking would be a problem, but 99% of the time when I'm trackballing around, I have my other hand on the keyboard, and could click there. Most things handle two mice doing coordinated gymnastics...This would solve all kinds of issues I had...