Review on Hudson Hi-Fi Silicone Isolation Feet - 4 Pack, Firm Block 150lb Capacity (Non-Adhesive) - Enhance Audio Quality & Stability by Charles Lewellen

Used for a NAS built into a Fractal Design Node 304 case with all 6 drives full (+ a USB stick inside as a hack of sorts). The case stands on a large bookshelf (IKEA) and the vibrations of the disc are well transmitted through the wooden structure. The felt pads I used didn't help. These silicone feet isolate vibrations very well. I feel a vibration when I touch the case, but I don't feel it when I touch the library. Using the felt pads, I was able to dampen the vibrations by pressing firmly on the top of the bookshelf with my hand. The only complaint is that the silicone legs don't have any tape. I've tried using double sided tape but it won't stick to the silicone. Maybe I should have sanded them first.