Yes, the manual isn't the best, but it's pretty easy to figure out without it. As one person suggested in his review, I would recommend turning all the bolts in the two backup rings before tightening them. It may take a little pressure to line up the holes, but I didn't have much of a problem. Of course, a little Loctite might be a good idea, although I didn't use it. Don't worry too much about it. (Edit after a month of use: I don't use them very often, but of course there was a screw on the floor under the stool, so I REALLY recommend Loctite). The only reason I deducted half a point is because I was hoping the seat would be more comfortable. It doesn't really have much "return". There isn't much padding. Yes it is a bar stool not a chair but I was just hoping they would be a little more comfortable. Plus they look great and I had no trouble putting them together. Certainly the second bowel movement is much faster than the first. I would skip the installation. Not so hot what's up. I'm very happy with it and would buy it again.
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