Experimentation
 

I've never really bothered experimenting until now, but I don't see a completely new tab for experimenting when I open my crafting window. Is there something I need to download or is it hidden somewhere else in the UI?

I never had a crafter high enough to test this either. There should be a tab appearing though.

Anyone else care to chime in that has a crafter?

Experimenting in DrumsUI is working fine. Just click on a crafting station then you will see default recipes and at top there is another tab named "experimenting".