Why are you bothering with fast? Do you want it fast or do you want it good? Best sounding one I have used is the Lurne clamp which is collet affair made from brass, delrin and wool......I use this in addition to the vacuum holddown on my table.....
What is the fastest clamp?
I recently got back into vinyl and part of my venture was getting a clamp for the turntable. I bought a KAB rubber clamp and it works fine. My only problem with it is that it is semi-cumbersome to install and remove. It is basically a rubber piece that is pushed on and pulled off. Sometimes the pushing or pulling has me physical moving the turntable around. It is sort of messy. Can anyone recommend a reasonably priced clamp that is easier to put on and take off or are all clamps like this?