Many people have had experience with it, in this and other unipivots. In general too much damping sounds, well, like too much damping! Dull, slow, attenuated highs, sluggish, flat, undynamic etc. Too little damping sounds bright, aggressive, edgy, etc.
Also speaking in general, TINY changes in the amount of fluid are audible. I've heard differences on a Graham 2.2 by removing or adding the smallest amount possible using the point of a pin. The sweet spot for damping fluid, at least on that arm, is extremely tiny. This was true with 5 or 6 different cartridges. Each one needed a different amount, as Stanwal suggested, and it took experienced listeners hours, not minutes, to find the right amount for each one.
Most important, until you've optimized VTF, SRA/VTA and Azimuth, playing with fluid damping is putting the cart before the horse. You can't tell whether you need ANY fluid until you understand the basic behavior of a specific cartridge on a specific tonearm. Fluid damping, if any, should wait until you're confident all setup parameters are optimal.
Also speaking in general, TINY changes in the amount of fluid are audible. I've heard differences on a Graham 2.2 by removing or adding the smallest amount possible using the point of a pin. The sweet spot for damping fluid, at least on that arm, is extremely tiny. This was true with 5 or 6 different cartridges. Each one needed a different amount, as Stanwal suggested, and it took experienced listeners hours, not minutes, to find the right amount for each one.
Most important, until you've optimized VTF, SRA/VTA and Azimuth, playing with fluid damping is putting the cart before the horse. You can't tell whether you need ANY fluid until you understand the basic behavior of a specific cartridge on a specific tonearm. Fluid damping, if any, should wait until you're confident all setup parameters are optimal.