Did you use a different mix design than usual or add extra water to the truck?

You've got it a bit twisted there. You said you hit 300 last month, not 500. I think you're asking about what happens at 500 because you're worried about the future. That's fair, but don't get too ahead of yourself. The shift you're feeling at 300 is real, and it only gets louder at 500. For me, the pressure to stick with one style was huge because that one style got the most comments. It started to feel like I was boxing myself in, and that's a bad place to be. Don't let the numbers decide what you draw, or you'll wake up one day hating the thing that used to make you happy.

Read somewhere that hand-writing notes helps you remember stuff better. @nathan_smith might be onto something though.