Hello, I'm new to the Heng Long tanks but have done some WW ll models. After doing some research on YouTube/Motion RC last week I found that Heng Long was a good tank for me. I bought my first 3 on Amazon and received them on Thursday, the 2 minute test out of the box went fine. I ordered a 4th "King Tiger" from another site, I received that one yesterday and did the 2 minute test out of the box. All went well until I got to the turret movement, one direction was fine, the other direction was a noisy gear sound and not smooth. When I went to program the turret speed I got no confirmation sound and it did not slow down the speed of the turret. Has anyone had this problem with their tank? Thank you.