Maintaining sync across multiple audio tracks

In the timeline I have a single video track  with some sync images and some B-roll images that float against the soundtracks. I have  8 audio tracks, some in sync with different video clips some not. I've trimmed one B-roll video clip and deleted a portion of it.
How do I adjust the 8 different audio tracks so they don't lose their sync relationship with the video timeline as a whole?
Used to be when cutting motion picture film multitracks we could delete an equal amount of fill from each track at different points for each so the overall sync stays the same.
But slug doesn't seem the same as fill--you can't mark a portion of slug in the timeline and delete it.
What I've figured out is to measure the timecode length of my deleted portion of a clip, and to advance each track along the timeline by that amount by selecting all audio tracks forward and entering the timecode. I guess if you inserted a B-roll clip you could do the reverse.
This seems to work but there has got to be an easier way. Or isn't there?
Doing these kinds of edits would seem to be standard for all kinds of docs and narratives but I can't find anything in the documentation except how to delete the same portions of tracks at the same edit points across all tracks.
Thanks . . .
Robert

It's not clear to me exactly what you're trying say, but that's probably because didn't go to school for this... I'm pretty sure I know how to cut multiple audio and video tracks because I've been doing it since FCP3. No matter how you express it, the facts remain:
You can cut with impunity if you go "old school" and unlink all the clips except the stereo pairs.
You can create and cut slugs to fill spaces.
You can mark clips to assist the sync process.
What I usually do is find a good series of sync points and mark the clips, then de-link. From there I can fung shui the clips to my liking and add slugs to fill voids and prevent unintentional movement.
Automatic? no. Difficult: no, not if you know your tools.
ps: I also drive a manual shift car and navigate with a printed map...  it just works.

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