My current bow sight is 15 years old and the pins aren't as bright as they should be. Its a 3-pin fixed. I'm kinda thinking of going to a single pin slider or 3 pin slider. Only problem is I'm not liking the idea of a single pin slider for elk, specifically for shots at bulls called in. The range can vary, can't move to change sight, etc. Sometimes the target spooks off 10, 20 yards, you know what I mean. Any advice?