I disagree with the majority of end users relying on a record clamp for the sole purpose of trying to flatten their records. I understand the reasoning being it’s a relatively low cost bandaid that takes up little room.
I purchased a record flattener specifically for it’s intended purpose.
I’ve found through my comparing many clamps/weights/mats through the years on my VPI Classic 3 SE Sig. (I understand this is tt design dependant) that a weight and mat is preferable to a clamp. Why, because it more directly couples the lp, and ultimately the cartridge/tonearm to the bearing. I’ve had great success with the OL weight and their initial mat. The goal, IMO, is to isolate the lp as much as possible from the bearing.