add angle bracket mounting system

rack-mount/enclosed-box/README.md

@@ -9,4 +9,4 @@ Please see [entry.scad](./entry.scad) for config and building. Make sure the cor
 - This system comprises three parts: two side rails, and a front plate.
 - This system is useful for mounting heavier box-shaped things. It works by first sliding in the box inside the side rails (which secures `x`, `z`, and one half of the `y` axis), and then mounting the front plate along the main rails (fully securing the `y` axis).
 - Side rails will most likely require supports to print.
-- For wider boxes (nearing the `maxUnitWidth` of the rack), you will have to set `recessSideRail` to true. This is so the side rails do not collide with the main rack rails. 
+- For wider boxes (nearing the `maxUnitWidth` of the rack), you will have to set `recessSideRail` to true. This is so the side rails do not collide with the main rack rails. 

rack-mount/enclosed-box/entry.scad

@@ -21,7 +21,7 @@ visualize = false,
 zOrientation = "middle", // ["middle" | "bottom"]
 recessSideRail = false,
 
-boxWidth = 200,
+boxWidth = 160,
 boxHeight = 27,
 boxDepth = 120,
 

rack-mount/enclosed-box/sideRail.scad

@@ -1,10 +1,10 @@
 include <../common.scad>
 include <./helper.scad>
 
-//sideSupportRailBase(top=true, defaultThickness=1.5, supportedZ=27.2, supportedY=101.5, supportedX=159);
+// sideSupportRailBase(top=true, defaultThickness=1.5, supportedZ=27.2, supportedY=101.5, supportedX=159);
 
 
-module sideSupportRailBase(top=true, recess=false, supportedZ, supportedY, supportedX, zOrientation="middle", defaultThickness=2, railSideThickness=4) {
+module sideSupportRailBase(top=true, recess=false, supportedZ, supportedY, supportedX, zOrientation="middle", defaultThickness=2, railSideThickness=4, sideVent=true) {
 
   mountBlockDepth = 10;
   screwMountGlobalDz = screwDiff / 2.0; // vertical distance between local origin and main rail screw mount
@@ -99,7 +99,7 @@ module sideSupportRailBase(top=true, recess=false, supportedZ, supportedY, suppo
           cube(size = [sideRailBaseWidth, railLength, railBaseThickness]);
         }
       }
-
+      if (sideVent) {
       union() {
         distanceFromSeparator = 3;
         r = 4;
@@ -136,6 +136,7 @@ module sideSupportRailBase(top=true, recess=false, supportedZ, supportedY, suppo
         }
 
       }
+      }
     }
   }