diff --git a/examples/floor_stand/floor_stand.scad b/examples/floor_stand/floor_stand.scad
index f7eeefd8..411ffe02 100644
--- a/examples/floor_stand/floor_stand.scad
+++ b/examples/floor_stand/floor_stand.scad
@@ -50,19 +50,18 @@ module floor_stand(width, height, thickness, spacing) {
     }
 
     module board_T() {
-        linear_extrude(thickness, center = true) 
-            union() { 
-                difference() {
-                    board_base();
-                    square([width, height / 3], center = true);
-                }
-                
-                translate([0, -height / 12 - spacing / 2, 0]) 
-                difference() {
-                    square([width / 1.5 - double_spacing, height / 6 + spacing], center = true);
-                    square([width / 1.5 - thickness * 2, height / 6], center = true);
-                }
+        linear_extrude(thickness, center = true) { 
+            difference() {
+                board_base();
+                square([width, height / 3], center = true);
             }
+            
+            translate([0, -height / 12 - spacing / 2, 0]) 
+            difference() {
+                square([width / 1.5 - double_spacing, height / 6 + spacing], center = true);
+                square([width / 1.5 - thickness * 2, height / 6], center = true);
+            }
+        }
 
         rotate([0, 90, 0]) {
             linear_extrude(width / 1.5 - double_spacing, center = true) 
diff --git a/examples/floor_stand/floor_stand_symbol.scad b/examples/floor_stand/floor_stand_symbol.scad
index 183e7bc8..b6e7e391 100644
--- a/examples/floor_stand/floor_stand_symbol.scad
+++ b/examples/floor_stand/floor_stand_symbol.scad
@@ -30,17 +30,16 @@ module content(text, font, font_size, symbol_png, symbol_unicode, symbol_font, s
     translate([0, -height / 1.8, thickness]) {
         color("black") 
         linear_extrude(half_th / 2) 
-        union() {
-            translate([0, -half_h / 3, 0]) 
-                multi_line_text(
-                    split_str(text, " "),
-                    font = font,
-                    size = font_size,
-                    line_spacing = line_spacing,    
-                    valign = "center", 
-                    halign = "center"
-                );
-        } 
+        translate([0, -half_h / 3, 0]) 
+            multi_line_text(
+                split_str(text, " "),
+                font = font,
+                size = font_size,
+                line_spacing = line_spacing,    
+                valign = "center", 
+                halign = "center"
+            );
+
         
         if(symbol_source == "DEFAULT") {
             color("green") 
@@ -62,14 +61,13 @@ module content(text, font, font_size, symbol_png, symbol_unicode, symbol_font, s
             color("black") 
             translate([0, half_h / 5, half_th / 4]) 
             scale([symbol_png_scale, symbol_png_scale, 1])
-                difference() {       
-                    cube([symbol_png_size * 0.99, symbol_png_size  * 0.99, stand_thickness / 4], center = true);                        
-                    
-                    translate([0, 0, -50])
-                    scale([1, 1, 100]) 
-                        surface(symbol_png, center = true); 
-                }
-            
+            difference() {       
+                cube([symbol_png_size * 0.99, symbol_png_size  * 0.99, stand_thickness / 4], center = true);                        
+                
+                translate([0, 0, -50])
+                scale([1, 1, 100]) 
+                    surface(symbol_png, center = true); 
+            }
         }
     }
 }
diff --git a/examples/hollow_out/hollow_out_square.scad b/examples/hollow_out/hollow_out_square.scad
index dd75cb56..7be39ace 100644
--- a/examples/hollow_out/hollow_out_square.scad
+++ b/examples/hollow_out/hollow_out_square.scad
@@ -24,8 +24,9 @@ function hollow_out_square(size, width) =
         rows = size[1]
     )
     [
-        for(y = [0:width:width * rows - width])
-            for(x = [0:width:width * columns - width])
-                for(line = h_lines_in_square(width)) 
-                    [for(p = line) p + [x, y]] 
+        for(y = [0:width:width * rows - width], 
+            x = [0:width:width * columns - width], 
+            line = h_lines_in_square(width)
+        )
+        [for(p = line) p + [x, y]] 
     ];
\ No newline at end of file
diff --git a/examples/hollow_out/hollow_torus_knot.scad b/examples/hollow_out/hollow_torus_knot.scad
index be032c06..40d2f7b2 100644
--- a/examples/hollow_out/hollow_torus_knot.scad
+++ b/examples/hollow_out/hollow_torus_knot.scad
@@ -20,14 +20,12 @@ else {
 }
 
 module hollow_out_torus_knot(shape, p, q, phi_step, thickness, line_style) {
-    function angy_angz(p1, p2) = 
-        let(
-            dx = p2[0] - p1[0],
-            dy = p2[1] - p1[1],
-            dz = p2[2] - p1[2],
-            ya = atan2(dz, sqrt(dx * dx + dy * dy)),
-            za = atan2(dy, dx)
-        ) [ya, za];
+    function __angy_angz(p1, p2) = 
+        let(v = p2 - p1) 
+        [
+            atan2(v.z, norm([v.x, v.y])), 
+            atan2(v.y, v.x)
+        ];
 
     function sects_by_path(shape, path) =
         let(
@@ -37,7 +35,7 @@ module hollow_out_torus_knot(shape, p, q, phi_step, thickness, line_style) {
             ],
             angles = [
                 for(line = lines)
-                let(a = angy_angz(line[0], line[1]))
+                let(a = __angy_angz(line[0], line[1]))
                 [0, 90 - a[0], a[1]]
             ]
         )