Okay, I finally figured it out. After removing the bottom of the turntable to get to the motor, I found that you need a ''really'' small screwdriver to actually get all the way into the hole and turn the potentiometer. I’m not sure what the exact size is, though I think a precision screwdriver that’s a few inches long will fit through the bottom of the turntable. I’ve got it all dialed in now, and it works perfectly! Thanks for the video, Mike.