It’s impossible to generalize about clamps and weights for turntables. It depends on the turntable. Some are designed to use them. Some will end up with destroyed bearings if you do where the weight is too much. Some motors will struggle with the added weight. Suspended tables might be thrown out of adjustment with them. Some turntables otherwise might work but not necessarily sound better. It depends.
I use a 1 kg weight and a 1.5 kg outer ring, but my TT is specifically designed for that use, and it sounds better that way.
Did I mention?...it depends.