There is a mistake in the logic for 11-B. The document says that the combo door needs to have 8+3i copies, but it actually needs to have 3-8i copies. That's because you start the level with 5-6i purple keys. The real part is positive and the imaginary part is negative, but the combo door has two positive locks, so you have to use the imaginary copies of the door before you use the purple rotor keys.