Turntable coupler became brittle and fractured

I simply pulled the old coupler off the moter shaft after removing glass turntable plate. The coupler lifted right out since it was fractured. Luckily all peices came out attached. Typically you would need to remove the bottom access panel on the microwave and remove the turntable motor to install the new coupler. However you can simply snap off the extra plastic piece that is molded to the coupler to allow for an easy push down onto the shaft from the inside of the microwave cooking area where the coupler fits onto the moter. Piece of cake. I don't believe there is any danger in shortcutting this because the weight of the glass plate will hold it in place.