You can always deal with these issues later, and they will simply get in the way of your experience. Avoid using the tank immediately before any commitment. John Lilly stresses the importance of this in his book. His failure to heed this advise almost cost him his life. Keep a log of your experiences in the tank.
Details can slip away quickly and having a written record can come in handy.
Share your experiences with others. Someone else may have an idea you hadn't thought of. Don't get in a hurry. Breakthroughs come in their own sweet time and don't like to be rushed. Remember to let the experience happen, don't try to force it.