Got a quick pic of the melted stand-off; doh:
A wee bit about the flight controller.
Had a bit of a fiddle with the windows utils to get the drivers installed so that my 7 install could talk to the FC, but didn’t have much luck.
Found this SPRacing F3 manual here, and it suggested going to the SILabs site to grab drivers. (As an aside, the other good thing about this manual is that it has a full circuitboard breakdown and explanation, which pins are which. It might be of some use at some point.)
Plugged it into OSX, grabbed the USB to UART bridge drivers from silabs and… worked first time. Easy peasy.
Tried it on windows with the silabs drivers. Worked immediately, too.
So that’s the secret with this board, go to SILabs.com and install those drivers, no need to mess around with Zadig, ImpulseRC_Driver_Fixer, STM32101(VCP) etc.