fix ventilation for sidewalls

rack/print/rackJoiner_P.scad

@@ -0,0 +1,5 @@
+include <../stackEnds.scad>
+
+// Oriented for 3d printing. No supports required, but it's reccommended to print this with a brim.
+// Adding a brim will require some post-processing in the form of trimming the bottom.
+rackJoiner();