I just purchased the GRZ2 and have two questions about the Diablo arrows that came with it. First, after a few shots, the field points were very loose. Should I put some blue Locktite on them, or just keep an eye on them and hand tighten them when necessary? Second, the product information card attached to the bow has the weight of the filed point blacked out. I'd like to get more arrows and field points, and have them be the same ones. How can I tell what weight field points they are?