Clip ratings lost when converted to compound

Hi - I'm using FCP 10.3 and I rated a few clips as favorite and rejected, then married the good audio to the video and made compound clips. The ratings I applied are gone once the compound clip is created (or a synced clip for that matter).

Is there a way to retain my ratings from my original library source media, after converting to compound clips?
Or maybe a way to copy/paste the ratings from one to the other?

Thanks for any suggestions.

The ratings on the original clips that live INSIDE the Compound or Sync are still there.
The Compound or Sync, when you create them, are no, independent clips, and have nothing, no ratings, nothing.
It is very, very easy to apply a Favorite or Rejected or Keyword to a Compound or Sync clip the moment you create it.
But no, they do not "inherit" anything from the clips that they contain, because if you had clips with different ratings, keywords, etc, how would it know which to use?

Thanks for clarifying, that makes sense.
Would be great to find a plugin to copy paste ranges of timecode.

What do you mean "ranges of timecode" exactly?

In the timeline:
I can hit R for my Range tool.
Click-drag to select a range.
Cmd-C to copy.
Cmd V to paste.

I think I may have communicated my intent ambiguously. I would like to be able to copy/paste the IN and OUT points of a range in the library or timeline. So Cmd-C would copy the timecode on both ends, ready to paste. Not a big deal, but maybe something to put in FCP's suggestion box.

Thanks for your help.

Not understanding. What would the In Point and Out Point timecode do for you? What is the goal? Can you give an example?

Well, I mistakenly applied my ratings to source clips in the library, and then converted those rated clips to compound clips. Once this was done, the ratings were removed from the compound clip. I should have made the compound clips in the library and THEN applied ratings.

I want to be able to select my "favorite" rated ranges for insertion into timeline. I can only do that with the original source video which contains my in-camera audio. Only my compound clips have the good audio from my off-camera audio recorder.

Anyway, I gave up looking for a solution and manually did a re-do of all the ratings. (my clips are 20 minute long interviews and only 2 or 3 minutes are going to be used from each clip)

What about a Smart Collection for your Favorited Clips? Then as you need to change them (and you always will, I do this same type of work), they automatically update in the Smart Collection.

But no, you can't assign TC to a rating, they aren't that technically deep.

I just drop the interviews into a Project and start cutting things I don't need out.

Indeed.
I like how there are multiple ways of achieving a result in FCPX.