i have managed to see the static while entering the theta gamma sync and i know it is possible to go deeper. my question is: do i need to have all my muscles relaxed completely if i want to go very deep or can i hold my neck straight?
Yes, hold your neck (and back) straight, although perhaps with the chin slightly low/in. While avoiding a sleepy state, indeed, relaxing your muscles will help progressing through gamma/rapture/crossroad.
thanks, much appreciated