You've got the instrumentation down all right. I get what you mean about using the major scale... it doesn't come naturally to me either, all I do is in some variation of a minor scale :v. I'm giving this a kinda high score since it actually accomplishes what it sets out to do which is to establish a christmas feel. Percussion is sensible and stuff and the mixing is pretty good except for the flute being a bit obnoxious maybe. Piano and bells sound awful though