I'll beg to differ. Some others on this board will beg to differ also.
It doesn't matter which rectifier tube you pull, you just need to pull one IF you are using the tube rectifier setting. If you use the diodes, there's no need to pull a rectifier tube.
Also, when you pull tubes, you'll need to plug your cab into the tap that's half of what your cab is....IE 8 ohm cab into the 4 ohm jack, 16 ohm cab into the 8 ohm jack, etc.