I suppose the brake line job may be because they have no idea what they'll get into reconnecting the water tank fill lines. IIRC, they're not visible at all. I'm pretty certain I know why they don't want the rear shock job. The RT-installed dropped floor almost traps the top mount bolt against the frame, making it just almost impossible to get the bolt out, or to reinstall the nut & washer. It's really crowded up in there.
I think someone once found & linked my old, old post about the contortions that I had to do on the shock job in the archives here, but I have no suggestions of what search terms to use. It would have been made in my first year here, if that helps any at all.
Jim, "Philosophy major: Will think for money."