Same prioject, same clips, different aspect ratio

Hi all, doing one of those framed quarantine-style music vids where each performer is in their own quadrant of the screen.  I've got the standard wide aspect ratio cut together and basically finished.  

I'd like to make a second video with the aspect ratio to 1080x 1920 for IG stories/tv.  I already duplicated the event, but how would i go about scaling the clips in the second event without affecting the original event?  It seems like I will need to re-import them to the new event?

All the timing and fades and everything are already complete, so it would be nice if all I had to do in the new event was a few transform functions to fit the puzzle pieces together in the new aspect ratio, and leave the timing and fades unchanged. 

Thanks!

You do know FCP has built-in tools for that, right? Here's two links to help,.

support.apple.com/guide/final-cut-pro/cr...6/10.5.1/mac/10.15.6

support.apple.com/guide/final-cut-pro/ad...f/10.5.1/mac/10.15.6

I didn't realize that!  thanks!