Where do I control the setting for the amount that is subtracted from the interior carcass width for the drawer box?

I just changed all of my materials from 5/8" stock to 1/2" stock for a particular project but when I redrew my products, MV is still subtracting the appropriate amount as if I was using 5/8" even though it draws as 1/2". 

I'm using "Wooden Dovetail Drawer Box" on Blum Tandems. I assumed MV would adjust this automatically, but that doesn't seem to be the case. My drawer box report generates boxes that would be the wrong size. 

Thanks for any help!