diff --git a/sbc_case_builder.scad b/sbc_case_builder.scad
index 489bf03..abab76a 100644
--- a/sbc_case_builder.scad
+++ b/sbc_case_builder.scad
@@ -1784,7 +1784,7 @@ module case_top(case_design) {
                 }
                 // create openings for additive 
                 if (class == "add2" && face == "top" && type == "standoff") {
-                    parametric_move_sub("round",loc_x,loc_y,case_z-floorthick-adjust,face,rotation,parametric,
+                    parametric_move_sub("round",loc_x,loc_y,loc_z,face,rotation,parametric,
                         6.5,size_y,floorthick+1,data_1,data_2,data_3,data_4);
                 }
                 if ((class == "add1" || class == "add2") && face == "bottom" && type == "uart_holder") {
diff --git a/sbc_case_builder_library.scad b/sbc_case_builder_library.scad
index b369b86..6b8ed9c 100644
--- a/sbc_case_builder_library.scad
+++ b/sbc_case_builder_library.scad
@@ -750,6 +750,7 @@ module fan_cover(size, thick) {
 // x - specified size along x axis
 // none - both borders the size of cell_spacing, no mounting holes
 // anything else ("default") - all borders of specified size
+//
 module vent_panel_hex(x, y, thick, cell_size=8, cell_spacing=3, border=3, borders="default") {
     hole = 3.2;
     xb = (borders == "y" || borders == "none") ? cell_spacing : border;
@@ -764,13 +765,13 @@ module vent_panel_hex(x, y, thick, cell_size=8, cell_spacing=3, border=3, border
 
     difference() {
         color("grey",1) slab([x,y,thick],2);
-	translate([(x-csx)/2,(y-csy)/2,-1])
+	    color("grey",1) translate([(x-csx)/2,(y-csy)/2,-1])
             vent_hex(cells_x, cells_y, thick+3, cell_size, cell_spacing, "horizontal");
 	if (borders != "none") {
-	    translate([    hxb,     hyb, -1]) cylinder(d=hole, h=thick+3);
-	    translate([x - hxb,     hyb, -1]) cylinder(d=hole, h=thick+3);
-	    translate([    hxb, y - hyb, -1]) cylinder(d=hole, h=thick+3);
-	    translate([x - hxb, y - hyb, -1]) cylinder(d=hole, h=thick+3);
+	    color("grey",1) translate([    hxb,     hyb, -1]) cylinder(d=hole, h=thick+3);
+	    color("grey",1) translate([x - hxb,     hyb, -1]) cylinder(d=hole, h=thick+3);
+	    color("grey",1) translate([    hxb, y - hyb, -1]) cylinder(d=hole, h=thick+3);
+	    color("grey",1) translate([x - hxb, y - hyb, -1]) cylinder(d=hole, h=thick+3);
 	}
     }
 }