Peep has to be adjusted for the individual user and has to match the diameter of the sight relatively. When you view thru a peep with the newer round housing sight, you chould only be able to the whole ring. Most are bright orange. Too large or too small can cause issues. If you pull back with your eyes closed, and then open and not dead on sight adjust up and down until you are.
They are super easy to tie in. No need for a shope or anything.