Two surfaces stuck together, like a sandwich with nothing inside and a surface perpendicular to those. When use Tab and Slot feature, the tabs only go through one surface, even though I have set the Blind distance to go through the two surfaces. How do I get the slot to go through both surfaces, and make slots in both surfaces, of course. Now, I only have slots in the first surface the tabs encounter. 

Thanks, 

Rick Shousha

Montreal