diff --git a/BaseLeft.scad b/BaseLeft.scad
index aac0929..6aec5c4 100644
--- a/BaseLeft.scad
+++ b/BaseLeft.scad
@@ -15,13 +15,13 @@ module through(l=7, lh=3.3, lt=1, lb=1){
 }
 
 module m3 (h=8, lb=1){
-    translate([0,0,-lb])cylinder(h+lb, d=2.5); // tapped M3
-    //translate([0,0,-lb])cylinder(h+lb, d=4); // rutex insert
+    //translate([0,0,-lb])cylinder(h+lb, d=2.5); // tapped M3
+    translate([0,0,-lb])cylinder(h+lb, d=4); // rutex insert
 }
 
 module m2 (h=8, lt=1){
-    translate([0,0,-lt])cylinder(h, d=1.5); // tapped M3
-    //translate([0,0,-lt])cylinder(h, d=3.2); // rutex insert
+    //translate([0,0,-lt])cylinder(h, d=1.5); // tapped M3
+    translate([0,0,-lt])cylinder(h, d=3.2); // rutex insert
 }
 
 difference(){
diff --git a/BaseRight.scad b/BaseRight.scad
index 0a7254a..4983295 100644
--- a/BaseRight.scad
+++ b/BaseRight.scad
@@ -15,8 +15,8 @@ module through(l=7, lh=3.3, lt=1, lb=1){
 }
 
 module m3 (h=8, lb=1){
-    translate([0,0,-lb])cylinder(h+lb, d=2.5); // tapped M3
-    //translate([0,0,-lb])cylinder(h+lb, d=4); // rutex insert
+    //translate([0,0,-lb])cylinder(h+lb, d=2.5); // tapped M3
+    translate([0,0,-lb])cylinder(h+lb, d=4); // rutex insert
 }
 
 difference(){
diff --git a/coolingFanDuct.scad b/coolingFanDuct.scad
index 1c08ee4..d85a920 100644
--- a/coolingFanDuct.scad
+++ b/coolingFanDuct.scad
@@ -10,8 +10,8 @@ yhbl = -15.5; // distance in y from fan center to center of nozzle (negative to
 zhbl = 27.2; // distance in z from fan to heat block underside
 zbed = 6.5; // how far does the nozzle protrude out of the heat block?
 xhbln = 11.5; // distance from heat block to nozzle center
-zgap = 2; // gap left to bed/part
-xgap = 3; // gap from duct to heat block
+zgap = 2.5; // gap left to bed/part
+xgap = 4; // gap from duct to heat block
 
 
 /* fan size */
@@ -114,5 +114,6 @@ difference(){
     translate([-1,y-bpt-0.4,-zofsmnt])cube([xto*2,bpt+1,zofsmnt+1]);
 
     // cut view
+
  //translate([-1,-1,-zhbl-zbed])cube([xto+xhbl+2,lf/2,zhbl+zbed+5]);
-} 
+}
diff --git a/coolingFanMount.scad b/coolingFanMount.scad
index 7b3c216..5eac124 100644
--- a/coolingFanMount.scad
+++ b/coolingFanMount.scad
@@ -34,12 +34,12 @@ module m2 (h=8, lt=1){
 }
 
 module mount(){
-    translate([4,4,-12])difference(){
+    translate([4,4,-18])difference(){
         hull(){
-            translate([0,0,6])cylinder(h=6, d=8);
-            translate([4,-4,0])cube([0.01,8,12]);
+            translate([0,0,12])cylinder(h=6, d=8);
+            translate([4,-4,0])cube([0.01,8,18]);
         }
-        translate([0,0,12])mirror([0,0,1])through(l=10,lb=1,lt=1,lh=7);
+        translate([0,0,18])mirror([0,0,1])through(l=10,lb=1,lt=10,lh=7);
     }
 }
 
diff --git a/shroud.scad b/shroud.scad
index 1b001cc..f4abe4c 100644
--- a/shroud.scad
+++ b/shroud.scad
@@ -29,8 +29,8 @@ module through(l=7, lh=3.3, lt=1, lb=1){
 }
 
 module m3 (h=8, lt=1){
-    translate([0,0,-lt])cylinder(h, d=2.5); // tapped M3
-    //translate([0,0,-lt])cylinder(h, d=4); // rutex insert
+    //translate([0,0,-lt])cylinder(h, d=2.5); // tapped M3
+    translate([0,0,-lt])cylinder(h, d=4); // rutex insert
 }
 
 module mount(){
diff --git a/stl/insert/BLTouch.stl b/stl/insert/BLTouch.stl
new file mode 100644
index 0000000..f11d9ce
Binary files /dev/null and b/stl/insert/BLTouch.stl differ
diff --git a/stl/insert/BaseLeft.stl b/stl/insert/BaseLeft.stl
new file mode 100644
index 0000000..6560484
Binary files /dev/null and b/stl/insert/BaseLeft.stl differ
diff --git a/stl/insert/BaseRight.stl b/stl/insert/BaseRight.stl
new file mode 100644
index 0000000..071de6b
Binary files /dev/null and b/stl/insert/BaseRight.stl differ
diff --git a/stl/insert/coolingFanDuct.stl b/stl/insert/coolingFanDuct.stl
new file mode 100644
index 0000000..03d82c1
Binary files /dev/null and b/stl/insert/coolingFanDuct.stl differ
diff --git a/stl/insert/coolingFanMount.stl b/stl/insert/coolingFanMount.stl
new file mode 100644
index 0000000..2dc60ac
Binary files /dev/null and b/stl/insert/coolingFanMount.stl differ
diff --git a/stl/insert/shroud.stl b/stl/insert/shroud.stl
new file mode 100644
index 0000000..9f8b90d
Binary files /dev/null and b/stl/insert/shroud.stl differ
diff --git a/stl/BLTouch.stl b/stl/regular/BLTouch.stl
similarity index 100%
rename from stl/BLTouch.stl
rename to stl/regular/BLTouch.stl
diff --git a/stl/BaseLeft.stl b/stl/regular/BaseLeft.stl
similarity index 100%
rename from stl/BaseLeft.stl
rename to stl/regular/BaseLeft.stl
diff --git a/stl/BaseRight.stl b/stl/regular/BaseRight.stl
similarity index 100%
rename from stl/BaseRight.stl
rename to stl/regular/BaseRight.stl
diff --git a/stl/coolingFanDuct.stl b/stl/regular/coolingFanDuct.stl
similarity index 100%
rename from stl/coolingFanDuct.stl
rename to stl/regular/coolingFanDuct.stl
diff --git a/stl/coolingFanMount.stl b/stl/regular/coolingFanMount.stl
similarity index 100%
rename from stl/coolingFanMount.stl
rename to stl/regular/coolingFanMount.stl
diff --git a/stl/shroud.stl b/stl/regular/shroud.stl
similarity index 100%
rename from stl/shroud.stl
rename to stl/regular/shroud.stl