I'd seen the Q Drum before, and thought the simplicity and effectiveness were great. I had not see the gravity light, but I like it, too. And I think you're ri

I'd seen the Q Drum before, and thought the simplicity and effectiveness were great. I had not see the gravity light, but I like it, too. And I think you're right about solutions being obvious only in retrospect. The simple fact that I can understand a solution as soon as I see it doesn't mean I'll think of the solution as soon as I encounter the problem. Or ever. In my coding, it's always easier to "see" the complex bad solution than the simple and elegant good solution.