I'm looking to dig in and replace my LBJ, ITRE,& OTRE but can find a write-up or info in the 4th gen.( looks different than the 3rd gen. writ-ups) I'm mainly concerned about the LBJ. I got the Haynes manual but it doesn't show it because when it was written you had to buy the whole LCA to get a new LBJ. Anybody have any info for me? Thanks in advance.