Please do not try this..... using tertiary alcohols is incredibly dangerous to begin with, using them to get through phenibut withdrawals would be fatally dangerous.
What's your phenibut dose per day?
Why don't you just go buy benzos online? Or something else? Why 2M2B? It's a very dangerous chemical.
Why not just go to detox? Do you have insurance?
What I am telling you is you have so many better, safer, and more effective options than buying 2M2B to get through phenibut withdrawal... Might as well use a gun to sharpen an axe.