OK, to clarify, my problem is that I've only used them twice, and I can't remember what both do together as opposed to just one. I have to do it to find out. Since I then only feel* the result and I don't see it, I forget where I am... and then I think about if I'm at the top of a gear or the bottom of a gear, and then* try to remember what the handles do. I think it's unintuitive for a visual learner. That's all. I think the little $10 gizmo sounds smashing.