Need some help on looping my plane, it just corkscrews
You also may want to try a BIGGER loop. A bigger loop will eliminate any "snapping" tendancy and also allow you to adjust as it loops.
Just be careful on the bottom of the loop. Try it high, so you aren't going to have to tighten it up on the bottom. If your plane has a snapping tendancy, you don't want to find that out 30 feet off the ground.
Mike