I'm trying to build a Charm of Keeping farm like DocM did. I've got the shifting floor going, but it's killing the slimes. Have I got the timing wrong maybe? I'm controlling it with a computer that does a 0.1 second pulse on each side and a 0.1 second delay between them. Or, is it supposed to kill small and medium slimes? The big ones don't seem to get hurt but it's hard to tell.