I installed a Dynavector XV-1S in a Well Tempered Arm and after reading the comments here about tracking heavy I first tried it at 2.4 grams with poor results. The highs were muddy and I could not make the specified 30 db separation, even after careful azimuth adjustment.
After trying 1.8 and 2.2 grams, I found that this particular cartridge sample and tone arm combination sounded best at 2.0 grams. I was also able to make 30 db separation at 1 KHz, L into R and R into L. at the 2.0 gram setting.
After I have 50 hours on the cartridge, I'm going to teak the adjustments again and see if I get any improvement in separation, IM distortion and overall subjective sound.