Hey, I've been looking around on YouTube and elsewhere about the way Bonham played this beat. Everyone I've seen play this beat plays it with on hand on the high hat and plays the groove that way. But the way I hear it he plays with two hands on the high hat, going R-L-R-L-R-R-L-R-L-R-L-R. I have been playing it this way for a long time and it sound great and it also sound just like he plays it. I should have a video on YouTube soon with me playing it. But what do you think?