Copy and paste Final Cut Pro assets to and from clipboard manager

I'm trying to find a way to successfully copy and paste assets to and from Final Cut Pro

Copying a Custom Background from Final Cut Pro seems to work but when I try to paste nothing happens.

This happens quite a lot in Clipboard apps. There's only one that I've found that accurately copies and holds them as snippets: "Copy 'Em"

I tried using that with BTT but

a) it needs hot keys for each asset and I have too many
b) this seems hacky
c) I'm trying to keep everything within better touch tool if at all possible

Could BTT allow copying and pasting of these assets?