cali combo INSTAL

This weekend im installing my fullsiin combo and i no i have to tack it on the top to get it to fit well i was test fitting it and the top rolled piece hits where the inside of my bed comes out like the bdy line stickes out. Do i cut that out or do i just push the bottom of the skin in so the body line meets than keep goin down? I appreciate all the help

gota get it to fit PERFECT. if that means grinding/trimming off just a hair then you gota do it. also brace the bed bedhind the skin so i wont crack out.