WLToys K989/K969/284131 radio upgrade FlySky FS-GT3B with EXP, Exponential. Improve steering.

The radio on the K989 and (also on WLToys 284131) isn't great, the steering has a huge dead-spot around center position. Upgrading the radio can fix that and improve steering. We upgrade the radio with a Flysky FS-GT3B which has no dead-zone and also add features like steering EXP (exponential), throttle and steering dual rate. This upgrade can also be used on the K969 and 284131 Links to the products mentioned: Dumborc x6fg https://www.banggood.com/custlink/vKD... FlySky FS-GT3B https://www.banggood.com/custlink/KDG... 20/30A Brushed ESC https://www.banggood.com/custlink/DGm... K989: https://www.banggood.com/custlink/vKm... K969: https://www.banggood.com/custlink/DDv... WLToys 284131 https://www.banggood.com/custlink/KmG... 0:05 The radio problem 2:07 Which radio to use for upgrade 4:54 Wiring up the receiver and ESC 6:26 Testing: Is the steering dead zone gone? 7:03 What is steering EXP and why is it good? 10:51 Test drive: K989 vs 284131 12:29 Conclusion