Hey guys, great guide here with pictures and everything!
you dont need a special tool to remove the factory crankshaft pulley, i found an old bolt that was the correct width to push through (dont need to thread it) one of the holes on the pulley into the boss (which later you have to cut off). this will stop the pulley from turning allowing you to undo the nut.
then removing the pulley is a case of gently levering it off with a long screwdriver.
i bought this one
Crankshaft Pulley Kit (For cars with AC)
I can feel the difference, it is a small gain, but its worth it.