28:59 Make this whole thing subsystems all these subsystems work together. Yeah. So think about that as you don't have to hit your form on your first prototype. You should be making your circuit works before you start shrinking it. Something
33:03 And you're like, oh, I had that signal on my board now. I can go wire green wire, jump that over to the microcontroller, and actually test to see if that works out well. Yeah. And that not just the microcontroller. Break every components out
27:18 And here's what I mean is, once you get your board and they're populated in one position or another, you test it out. If you find it works, great. If you find it doesn't work, flip them, and then immediately, like that exact second, go and fix it in your design. Don't wait. That's the other half of it.