Me and a buddie had a discussion about a sight setup for HC it is that a sure Loc sight with the razor pin attachment now only with the 4 pins is illegal in HC because its adjustable. but I said as long as you dont adjust it when you start the course its legal can some one shead some light to this..

You are correct. The rules state "A sight used in a fixed pin class may not be adjusted once the archer enters the shooting course."