Hi Zenieth,
The counter weight on the JMW 9 tonearm is a problem. Yes you do have to put a lot of muscle on the screw in the counterweight to lock it down. This is a design flaw. With my first JMW tonearm I could not lock the setscrew down and the position of the counterweight always moved. You should contact VPI and get a replacement.
Use lithium grease on the ball bearing and apply mobile synethic 5w20 to the bearing shaft.
The counter weight on the JMW 9 tonearm is a problem. Yes you do have to put a lot of muscle on the screw in the counterweight to lock it down. This is a design flaw. With my first JMW tonearm I could not lock the setscrew down and the position of the counterweight always moved. You should contact VPI and get a replacement.
Use lithium grease on the ball bearing and apply mobile synethic 5w20 to the bearing shaft.