Well, I was going to post and say: wouldn't it be embarrassing if you made a mistake on such a simple model ;-)
Then I noticed that your main rotor is 8 ldu too low and clashing with the red studs...
Edit: if this link is anything to go by, the red plating probably isn't quite correct:
https://www.toysperiod.com/lego-set-refe...elicopter/
http://i.ebayimg.com/images/g/biYAAOSw6E...-l1600.jpg
Then I noticed that your main rotor is 8 ldu too low and clashing with the red studs...
Edit: if this link is anything to go by, the red plating probably isn't quite correct:
https://www.toysperiod.com/lego-set-refe...elicopter/
http://i.ebayimg.com/images/g/biYAAOSw6E...-l1600.jpg