I recently bought a Goldring GR2 turntable. The turntable sounds great in my system, but I have one concern....the tonearm will (slowly) drift back to the armrest when I lift it up from the lp. I've read and reread the setup instructions and I've set up and re-set up the arm, but the "problem?" still persists. Am I doing something wrong? (this was/is my first thought). The arm is an RB250 which, I assume, has been reworked by Goldring somehow. Any tips/hints/advice would be appreciated.