Agree with the above suggestions and my opinion on your question about using the tip of the arrow on a spot to do your bare shaft testing is a good one. It will give you more consistent results and unless your form and instinctive shooting is really good, which I get the feeling it's not as good as it could be, your arrows won't tell you the truth. Use the point, get the bow tuned, and then when you do start shooting targets you will know its you and not the setup when you miss. Nothing slows down learning instinctive shooting than inconsistent results.