It's easy to phase from Focus 10, though it sounds like you were well on your way to Focus 12. However, that track is designed to pull you back into C1, as you already know. For this reason, I recommend "The Frank Method" of listening to the track, then putting the headphones away and simply remembering the sensations you experienced. This should pull you back into Focus 10 without the Hemi-Sync, and without Monroe calling you back before you can phase.