Is there a way to link an properties expression into one layer only?

[fairy_ley]

Hi, I have 30 layers and each layers have it's own position keyframes. I add expression loopOut() for each layers for position properties. Is there a way to link an properties expression into one layer only? so if I want to change the expression, I don't need to change all layers expression one by one.

[Mylenium]

You could try eval() and write the expression as a text string in a separate layer. But generally I consider this bad practice even if a ton of scripts and tools like Mr. Möhl's iExpressions use this hackery just as well...

Mylenium