ON my first LT40 ARF, I used a professional hairdryer that my wife has, because at the time it was all I had. I used to to take out some wrinkles in the covering on the wings, and it actually worked okay, it just took a while to get it all done. It would not work for doing a covering job, though. Not hot enough, as was said earlier. I bought a Hobbico heat gun, and it was a good investment at $13.00. I bought the gun and a good covering iron for less than what my wife paid for that hairdryer!