If you buy the socket cable and USB port dongle thing then you can update the ESC without the need to get the soldering iron out. A bit of an investment but once you realise how bombproof these ESCs are then I think they are hard to beat for the money.

S.

https://hobbyking.com/en_us/turnigy-...w-5a-sbec.html £32.99

https://hobbyking.com/en_us/atmel-at...hing-tool.html £15.66

https://hobbyking.com/en_us/usbasp-a...occessors.html £3.08