Funny enough, I found your forum post as I was having serious wow and flutter issues with a Beogram 1700 that I just picked up. After recapping the board and adding a new belt, I was lost. My rpm app would get readings of up to 3% w&f. After nearly tearing my hair out, I found the solution. For me, it was the motor. Removed the pulley and put a good drop of machine oil on it, running it using the TURN button. After reassembling, the table now runs like a beauty. Good luck with your issue!