All manufacturers of this and 412 helo are making a few mistakes.
The nose is to long and pointed upwards, the dog house has too much edges, it is suppose to be more rounder... stuff like that. It is one of the most common helos out there, and still, the manufacturers got it wrong. Just like jetranger. There isn't one plastic model a like, all with errors, none like the real thing.
Anyway, you made a great model despite all of the above.