Marco,I don't mean to be rude or hypercritic,but if the livery is like in the photos,we are far from the original one,first of all the grey bottom part of the belly is completely missing,secondly in this photo is clearly visible under the wing a registration not belonging to this plane,the Alitalia words are a bit too small and not in the correct position and the gap in the green paint at the tail is a bit too big compared to the real plane,and lastly the green paint is a bit too dark.I would suggest to have a look at some photos on internet and work a bit more on it,you certainly have the skill to fix it.
p.s. I just noticed that also the white letters SB are inverted at the top part of the tail.