You don't need to remove the nose to put the ZG Corsa shield. I did it last week and just used my two fingers, palms up to hold the nuts on the lower part. There is enough flex in the plastic to slide your hand down there, unless you have really huge hands.
Just remove the mirrors and two upper screen screws.
how difficult is removing the mirrors? i dont have the manual handy nor the bike near me to check it out lol