Thermwood / eCabinet Systems

While waiting for the sun to rise in Dale, I played around with this box. I physically put dados on the front edges in the part editor, I then tried to add a back panel from another cabimet but the back failed to resise with the rest of the box. (that might have been my inexperience). Then I added a ...

I am trying to create a fully enclosed box using full dados. I can't figure how to put dados on the front edges