diff --git a/Werkbank-balken/assembly.scad b/Werkbank-balken/assembly.scad
index 1760417..0588bc0 100644
--- a/Werkbank-balken/assembly.scad
+++ b/Werkbank-balken/assembly.scad
@@ -4,19 +4,20 @@ use <top.scad>
 use <stand.scad>
 use <connector.scad>
 
-// === topbeams ===
-for (i=[0:topdepth/topbeamthickness-1]) {
-	translate([topbeamthickness*i, topsidethickness, benchheight-topheight]) {
-		beam();
-	}
+// === top sides ===
+translate([0, 0, benchheight-topsideheight]){
+	topside();
+}
+translate([topdepth, toplength, benchheight-topsideheight]){
+	rotate([0, 0, 180])
+		topside();
 }
 
-// === top sides ===
-translate([0, 0, benchheight-topheight]){
-	topside();
-}
-translate([0, toplength - topsidethickness, benchheight-topheight]){
-	topside();
+// === topbeams ===
+for (i=[0:topdepth/topbeamthickness-1]) {
+	translate([topbeamthickness*i, topsidewidth, benchheight-topheight]) {
+		beam();
+	}
 }
 
 // === stand bottom ===
diff --git a/Werkbank-balken/dimensions.scad b/Werkbank-balken/dimensions.scad
index 7447bb0..47a5735 100644
--- a/Werkbank-balken/dimensions.scad
+++ b/Werkbank-balken/dimensions.scad
@@ -5,8 +5,10 @@ toplength = 1500;
 topdepth = 630;
 topheight = 50;
 topbeamthickness = 45;
-topsidethickness = 50;
+topsidewidth = 65;
+topsideheight = 80;
 topslitdepth = 20;
+topslitheight = 14;
 
 connectorheight = 100;
 connectorthickness = 30;
diff --git a/Werkbank-balken/top.scad b/Werkbank-balken/top.scad
index 32286cf..5704fc3 100644
--- a/Werkbank-balken/top.scad
+++ b/Werkbank-balken/top.scad
@@ -1,16 +1,26 @@
 include <dimensions.scad>
 
 module beam(){
-	cube(size=[topbeamthickness, toplength - 2 * topsidethickness,  topheight], center=false);
-	echo("#### Top beam: length = ", toplength - 2*topsidethickness + 2*topslitdepth, " height = ", topheight, "width = ", topbeamthickness);
+	cube(size=[topbeamthickness, toplength - 2 * topsidewidth,  topheight], center=false);
+	translate([0, - topslitdepth, topheight/2 - topslitheight/2])
+		cube([topbeamthickness, topslitdepth, topslitheight]);
+	translate([0, toplength - 2 * topsidewidth, topheight/2 - topslitheight/2])
+		cube([topbeamthickness, topslitdepth, topslitheight]);
+	echo("#### Top beam: length = ", toplength - 2*topsidewidth + 2*topslitdepth, " height = ", topheight, "width = ", topbeamthickness);
 }
 
 module topside(){
 	color("red")
-	cube(size=[topdepth, topsidethickness, topheight], center=false);
-	echo("#### Top side beam: length = ", topdepth, " height = ", topheight, "width = ", topbeamthickness);
+	difference(){
+		cube(size=[topdepth, topsidewidth, topsideheight], center=false);
+		translate([-20, topsidewidth-topslitdepth, topsideheight - topheight/2 - topslitheight/2]){
+			cube([topdepth+40, topslitdepth, topslitheight]);
+		}
+	}
+	echo("#### Top side beam: length = ", topdepth, " height = ", topsideheight, "width = ", topsidewidth);
 }
 
+
 beam();
 topside();