CopyMask2Layer is a new After Effects script at AE Scripts. I think everybody has run into a problem once or twice when trying to move masks around from one layer to another... Luckily, Mathias Möhl brings a fun solution to the table.
When you copy a mask from one layer to another it often changes its position. With CopyMask2Layer you can copy masks while keeping them perfectly in place - even if the layers are moving and if the mask path is keyframed.
The demo video will immediately answer the questions you have in mind!