MK3 To MK3S Upgrade Assembly

I am upgrading my MK3 to MK3S since the new extruder design has been rolled out as well as replacing the old laser sensor to a generic optical sensor that's often used as axis endstop for better accuracy.

BGM Audionautix.com - A View From Earth

Image courtesy of Prusa3d.com ... https://www.youtube.com/watch?v=BgQt_SoPrFs