I have a question regarding the Leupold RX 1200i rangefinder. If I am only going to be using this while bowhunting, do I need to the RX 1200i with the TBR (True Balistic Range) or can I just purchase the RX 1200i. If I don't need it (TBR) I don't want to spend an extra $50. The one thing I really want to make sure it has is angle adjustment. Can anyone who has had some experience with these rangefinders help me out. Thanks.