cam sensor

Hi all
I am going to change my cam sensor to-morrow or Friday and was wondering if I need any thing else beside the sensor eg a cam gasket and I cannt find a how to

Remove the cover over the coil packs/plugs to expose the sensor, remove the one bolt holding it in place and pull out, unplug the wiring.

The seal is an 'O' ring which may come with the new sensor or refit the old if it looks in good condition.

Thanks for that Badger