J.A. Michell clamp was the lightest I identified. One problem is that you will likely need to stop your table each time you change LP sides--unless you don't mind adding ALOT of rotational torgue at each record flip. I finally decided not to buy/use a clamp. LP12 was not aurally designed for one, can damage bearings and suspension. For me, it was a momentary (month-long) obsession. If you decide to try it, I hope you'll report your results. Good luck!