For your trainer I would not worry about that amount of gap. It will fly fine.

This forum is for the company Nitro Models and their planes. For the best help with trainers in general I might sudjest you post in the beginners forum in the future. Not that I mind helping you here though You will definately get faster responses in the beginners forum as it is always very active with people that only want to help you. Best of luck with your new plane! You do have an instructor... right?