By chance I came across this part of Amazon and read after some reviews, I ordered to precisely eliminate this problem with me. Delivery fast and free ... actually everything .... Top But then .... went my screws no longer notice and I was desperate just before ... Again and again I looked at the sparse packaging ... but there was nothing ... until I looked at the website ... and lo and behold: VERY IMPORTANT: The parts must be cut to the height of the holes in the toilet bowl. Well and already worked out the matter ;-) No more shaking and perfectly tight fit ;-)))))) Before, I wanted to buy new mounts for my toilet glasses, but they are not necessary.