diff --git a/boxes/generators/brick_sorter.py b/boxes/generators/brick_sorter.py
index e83ddd40..c86c7553 100644
--- a/boxes/generators/brick_sorter.py
+++ b/boxes/generators/brick_sorter.py
@@ -43,7 +43,7 @@ class BrickSorter(Boxes):
         )
     )
 
-    bottom_edge: str = "h"
+    bottom_edge: str = "s"
     level: str
     radius: int
     wiggle: float
@@ -89,7 +89,7 @@ def _sieve_level_index(self) -> int:
 
     @property
     def _outer_height_after_nesting(self) -> float:
-        return self.h - ((2 * self.thickness + 2) * self._sieve_level_index)
+        return self.h - ((4 * self.thickness + 2) * self._sieve_level_index)
 
     def _xy_after_nesting(self, a: float) -> float:
         return a - ((2 * self.thickness + self.wiggle) * self._sieve_level_index)