Dear Sean, I was also to slow to to see the 'light'.
But you need to unscrew just one screw to exchange the cart
holder. The Allen keys are everywhere obtainable. The azimuth part is a separate option and has no connection with 'cart holder' exchange. You may but do not need to use (or order) the azimuth part. The long screw which keep the cart-holder connected to the armwand needs a very small Allen key. I own many of those because I am a tonearms addict.
Regards,
But you need to unscrew just one screw to exchange the cart
holder. The Allen keys are everywhere obtainable. The azimuth part is a separate option and has no connection with 'cart holder' exchange. You may but do not need to use (or order) the azimuth part. The long screw which keep the cart-holder connected to the armwand needs a very small Allen key. I own many of those because I am a tonearms addict.
Regards,