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I just got the ESC's today. 10 days to the US via ePacket!
They work perfect however for reverse you have to return to neutral and pause before it will actually reverse. VERY ANNOYING!
THERE IS A FIX THOUGH!
This is crazy tiny, so if you are not very skilled at soldering don't even bother! I had to use a magnifying glass to do it and even then it is NOT EASY.
You first need to take off the heatshrink, then flip it over to the side with all the wires. Go ahead and unsolder the switch to not only get the wires out of the way, but to simplify the wiring. It is not needed, but you do have to bridge the solder points together which will turn it on anytime it is connected to a battery.
Now, look for the arrow that is right between servo wires and where the on/off switch pads are. You can see that it is pointing to 2 very tiny dots of solder that are not connected to each other. All you need to do is bridge these 2 pads together without touching anything else. LOL it's sounds easy, but trust me I had a hard time actually getting a bridge between them. (I usually have the opposite problem!!) I finally got them bridged by putting a tiny drop of solder on the very small tipped soldering iron and letting the flux completely burn off.
Once you get this done carefully inspect to make sure nothing else is bridged and the flux is scraped off as much as possible.
You now have instant reverse!