I recently picked up a Grafmatic back, and I haven't had a chance to use it yet. I have to say, though, that it's a really neat piece of engineering. It reminds me of one of those false door magic tricks where you put the coin in the slot and tap it with your wand, and it disappears. I've watched a few videos on it, and I'm really looking forward to taking it out in the field.

As neat as it is, the moving parts are mostly bent metal, and it seems like there could be come gotchya's to them. I certainly don't want to bend a septum. So what do I need to watch out for, either to avoid ruining my film, or to avoid breaking the Grafmatic?