Hi Troy... glad you're back with it! I'll agree with what's already been said in that nearly all trainers benefit from a bit of down thrust. With more speed, a flat bottom wing will usually tend to climb, and the down thrust in the engine counters this. Often not perfectly though. An advantage of this is in a dive, as speed increases the airplane will tend to pull up...especially if you chop the throttle. Yours is probably ok where it is.