One thing we got lots of here is advice, lol. 1st off, are you using a rope cocker? They center the string for you. White out on string next to rail at rest will help if you hand cock it. W/ the Excal type you have to put the hooks on upside [hits safety if you don't]down on a Horton and run the rope thru the hole on stock. The knob on the side iscalled "Dial-A-Range and is for single aim point red dots or scopes. It's also called "Dial-A-Rage" for when the rope cocker moves it and you miss a shot, lol. Some Horton guys have pinned it solid and gone to multiple aim point scopes. I've had very poor luck w/ Hortons version of that, they tend to fog up internally. Check out an Excal V-zone or L-zone. Welcome to the forum!!