Graham Phantom with Benz Lp-s Tracking problems

Hello to all,

i recently mounted my new Lp-s cartrige on the Phantom B-44. The sound is great, but i have problems with some Lps, 4-5. On all it is on the beginning of the record. I can see a little but quick jumping from the cartridge, it isn´t much but the stylus looses contact with the groove and i hear something like a rumble. I don´t know if it´s the right word. And when i put up the volume it distorts. Benz told me that the best way for working the Lp-s is that the counterweight should be very close to the center of the tonearm and it isn´t, it is 1cm or more away from the top.
I wrote Bob Graham to tell me his thoughts, will see what he tells me. Maybe i have to change the ring of the counterweight to a heavier one!?
Has someone experience with this problem?

Many thanks and happy new year !!!!!!!!!!!

Best wishes from spain,

Agustin