diff --git a/openscad/own/supermicro_cs836_fan-holder/fanholder_38mm_center.stl b/openscad/own/supermicro_cs836_fan-holder/fanholder_38mm_center.stl
new file mode 100644
index 0000000..a93228e
Binary files /dev/null and b/openscad/own/supermicro_cs836_fan-holder/fanholder_38mm_center.stl differ
diff --git a/openscad/own/supermicro_cs836_fan-holder/fanholder_back.scad b/openscad/own/supermicro_cs836_fan-holder/fanholder_back.scad
index 18738e3..ba17ad0 100644
--- a/openscad/own/supermicro_cs836_fan-holder/fanholder_back.scad
+++ b/openscad/own/supermicro_cs836_fan-holder/fanholder_back.scad
@@ -23,7 +23,7 @@
 //##################
 //
 // VARS
-old_fan_depth=34;       // height of the fan, which is goint to be replaced
+old_fan_depth=38;       // height of the fan, which is goint to be replaced
 fan_dia=80;             // fan diameter
 fan_depth=25;           // desired fan-depth, most likely 25mm unless you use server-fans
 fan_oversize=10;        // more headroom for the radial area
@@ -33,8 +33,8 @@ length=fan_dia;
 hole_dia=4.25;          // diameter for the screw holes. I designed them with a slight slope for easy insertion
 hole_offset=4.5;        // x and y offst of the screw-holes from the corner (centered), 4.5mm for 80mm fans
 depth=old_fan_depth-fan_depth; // the difference to be gapped
-cage_mt=2;              //roughly the material thickness of the cage
-screw_clearance=2;      //clearance in the Wall for the screw head
+cage_mt=2;              // roughly the material thickness of the cage
+screw_clearance=1.5;    // additionalclearance in the Wall for the screw head
 $fn=100;
 //
 //##################