It's only four screws and it's the reason I supply that nifty little ball driver with all of the kits. I read Mister Rogers quote, but please, please be careful. If you're going to leave the top open when rolling, at least unplug the amplifier every single time you try to change tubes. (It would be better to leave the top screwed on.) There's still ~250V inside the amp and all you may have to do is brush the top of a capacitor to get shocked ... or worse.