Chak, are you sure it’s good advice to say categorically that 900g, about two pounds, is ok for any DD turntable? Especially when MS made it for their belt driven high end tables?
Why do you thing they made it for Belt Drive turntables ? Micro made Direct Drive turntables too.
900g is OK for all Direct Drive turntables, probably 500g is more comfortable for the user, but it's irrelevant for the motor/bearings.
I agree with Raul that a screw on or clamp type is to be preferred usually, but a mid weighted weight may tame some resonances.
Micro
ST-20 is lightweight and it's a clamp, not just weight like cheaper
ST-10.
I use the SOTA reflex clamp or the weight made by kenwood for the LO7D, which weighs I’m guessing 250 to 350g.
I tried many (same weight) and in my opinion they are too light imo.