My bow has a 65/80 adjustable let off, but how do I adjust this? I see on the cam there are two different places where the string can be attached, hopefully someone knows what I'm talking about. What are these little things, and what would happen if I switched where the string was located? Thought I'd ask before I jumped on my bowpress and just started messing around. Thanks. If no one knows what I'm talking about I'll try to post a pic.

Without the pic, I think you are referring to the different posts on the cam to relocate the stgring. These are used for 1/2" drawlength positions. 1" changes are accomplished with module changes. And if I am right to change the let-off percentage you have to get different modules. Parker makes modules for 80% (standard) and 65%. If you can't find one then many of their bows use the same modules as Pearson bows.