About The Breathing Tube from The Merkaba meditation

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I always visualize the breathing tube on my auxilliary chakras on the spine, but is this correct?
Would it be beneficial if I did the Merkaba Meditation three times, each focusing on a different chakra branches(main,secondary and tertiary)?

I ask this because I read Meditation in Three's by HP Vovim Baghie and a lot of meditations like Single Serpent meditation are best if done three times for each chakra branch. So maybe this applies to the Merkaba meditation too?


Thanks !!

Hail Father Satan !!!
Hail ALL the Gods ov Duat !!