file size, duplicate asset, replace asset

Hi,

I wonder how this works in Aero:

- If I import an asset and duplicate it in Aero, it seems to only use the size of the imported asset one time.

- However, if I need to replace the asset with another asset, I have to replace it twice, and then it doubles the file size.

I like to keep my file size as small as possible, and I reuse the same assets. 

It would also be nice if all the duplicated assets could be exchanged at once.