The controller is excellent, very precise and with a lot of adjusting possibilities. Receiver is standard and works fine. Gearbox works well, but this is the older version with a spring for returning the lower gear back. This is sometimes not much reliable as the spring is quite weak.I changed the original plastic gears to the metal ones (also bought on Banggood) and it helped a lot, but the gearbox is noisy now.
I installed the whole system to WPL B36 and it fits perfectly, without any modification needed.
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