I am going to replace a broken pickup-holder (the black plastic tounge) on a pick-up arm on a beogram 4000. I have a spair pick-up arm 2850052 but the broken pick-up holder is unfortunately on a 2850073. What is the best way to dismantle the components inside the pick up arm. I have tried to move the pickup-holder. I does not want to move outward but can be pushed 0.5 mm into the arm and then can be pulled back into place. My plan is to have the holder moved from the 2850052 arm to the 2850073 arm.

Regards

Hans