Control assembly fabrication via brazing

A system to control fabrication of an assembly, the system comprising:

• a first end sheet having an interior surface and an exterior surface, opposite the interior surface, wherein the exterior surface of the first end sheet is an exterior of the assembly;
• two or more interior sheets, the two or more interior sheets including a first interior sheet at one end of a stack of the two or more interior sheets and including a last interior sheet at an opposite end of the stack of the two or more interior sheets, the first interior sheet being adjacent to the interior surface of the first end sheet;
• a second end sheet having an interior surface and an exterior surface, opposite the interior surface, wherein the exterior surface of the second end sheet is also an exterior of the assembly,
• the last interior sheet of the two or more interior sheets is adjacent to the interior surface of the last end sheet, and
• the interior surface of the first end sheet or the interior surface of the second end sheet includes one or more venting features, the one or more venting features including slots configured to channel heat, gas, or vapor during a brazing process to braze the first end sheet, the two or more interior sheets, and the second end sheet into the assembly, wherein the slots are formed in a pattern, wherein the pattern includes concentric circles with diagonal slots that cross at a center of the concentric circles and extend to the edges of the interior surface of the first end sheet or the second end sheet.