So I was bored today and drew up a stand for when you are working on your quad and dont want your VTX over heating. It takes an 80mm fan. I put a step down regulator on this to maintain 12v going to the fan, and a voltage display to make sure you dont drain your battery, and can calibrate your voltage readout in Betaflight. I have a male and female XT60 soldered together so you can just put it between your battery and quad.
Step Down Regulator.