Raptor 165hz 90 defree dilt

So I have it adjusted all the up but now I can't get it to 90 degrees. I don't want to put too much force on trying to get it to 90 degrees because I don't want to break it. Can someone tell me if I just need to try a lot harder, tell me something I might of missed, or just something so I can set it up? Ive seen some posts here, but none of them have answer, to add, ive seen videos but all of the, seem to do it effortlessly.