is there a way (with the unicorn account) to see which modules you have used from my collection, but not in the active rack. I have a few racks and when i'm planning a new one i'd like to see which are currently used in my other racks
-- geoffcrowther

A few days ago, I needed the same thing.
A diff wizard for two or more racks would be really great.

Since there's currently no way to have a specific number of the same module in your own collection, you'd have to create a separate rack with your collection. That way, it would also work with multiple instances of the same module.

@geoffcrowther As a tedious workaround see https://modulargrid.net/e/forum/posts/view/42725