diff --git a/Production/3DPrint/TT_base_hinge_150.stl b/Production/3DPrint/TT_base_hinge_150.stl
new file mode 100644
index 0000000..3db5226
Binary files /dev/null and b/Production/3DPrint/TT_base_hinge_150.stl differ
diff --git a/Production/3DPrint/TT_base_hinge_170.stl b/Production/3DPrint/TT_base_hinge_170.stl
new file mode 100644
index 0000000..8cf0b0d
Binary files /dev/null and b/Production/3DPrint/TT_base_hinge_170.stl differ
diff --git a/Production/3DPrint/TT_base_hinge_cover_150.stl b/Production/3DPrint/TT_base_hinge_cover_150.stl
new file mode 100644
index 0000000..7a1e447
Binary files /dev/null and b/Production/3DPrint/TT_base_hinge_cover_150.stl differ
diff --git a/Production/3DPrint/TT_base_hinge_cover_170.stl b/Production/3DPrint/TT_base_hinge_cover_170.stl
new file mode 100644
index 0000000..8ee0d1a
Binary files /dev/null and b/Production/3DPrint/TT_base_hinge_cover_170.stl differ
diff --git a/Production/3DPrint/pcb_bottom_left_hinge.stl b/Production/3DPrint/pcb_bottom_left_hinge.stl
index ee80751..45bfcb8 100644
Binary files a/Production/3DPrint/pcb_bottom_left_hinge.stl and b/Production/3DPrint/pcb_bottom_left_hinge.stl differ
diff --git a/Production/3DPrint/pcb_bottom_right_hinge.stl b/Production/3DPrint/pcb_bottom_right_hinge.stl
index 5ed3520..ef54cea 100644
Binary files a/Production/3DPrint/pcb_bottom_right_hinge.stl and b/Production/3DPrint/pcb_bottom_right_hinge.stl differ
diff --git a/cad/TT_base_hinge.scad b/cad/TT_base_hinge.scad
index 45f60fe..2a8f087 100644
--- a/cad/TT_base_hinge.scad
+++ b/cad/TT_base_hinge.scad
@@ -1,7 +1,7 @@
-export_tt = true; // this is for main body
+export_tt = false; // this is for main body
 export_hinge = true; // actually this is for hinge cover
 
-disc_d=150; // disc size you need to specify
+disc_d=170; // disc size you need to specify
 
 
 d1=disc_d+14; // lower outer
@@ -69,17 +69,17 @@ module body() {
 
     // bearing screws
     color("gold") {
-      screw([-14.5,-14.5,-1.8]);
-      screw([14.5,14.5,-1.8]);
-      screw([-14.5,14.5,-1.8]);
-      screw([14.5,-14.5,-1.8]);
+      screw([-14.5,-14.5,-1.81]);
+      screw([14.5,14.5,-1.81]);
+      screw([-14.5,14.5,-1.81]);
+      screw([14.5,-14.5,-1.81]);
     }
     color("darkgreen") translate([0,0,pcb_h]) rcube(23.2,23.2,5,2.5);
     
     // pads
     for (i = [90:60:300]) {
-      pr=d2/2-1;
-      translate([cos(i)*pr, sin(i)*pr, -1]) cylinder(d=9.5,h=1.8);
+      pr=d2/2-2;
+      translate([cos(i)*pr, sin(i)*pr, -1]) cylinder(d=9.8,h=1.8);
     }
     
     hinge();
@@ -99,8 +99,8 @@ module rcube(w,h,d,r) {
 module screw(pos) {
   translate(pos) {
     cylinder(d=3.3,h=10,$fn=32);
-    cylinder(d=6.8,h=4.4,$fn=6);
-    cylinder(d=9.5,h=1.8,$fn=32);
+    cylinder(d=6.9,h=4.4,$fn=6);
+    cylinder(d=9.8,h=1.8,$fn=32);
   }
 }
 
diff --git a/cad/pcb_bottom.scad b/cad/pcb_bottom.scad
index d9ba12e..2d6f7f8 100644
--- a/cad/pcb_bottom.scad
+++ b/cad/pcb_bottom.scad
@@ -1,7 +1,7 @@
 pogo=false; // if you use pogopin connector
 jack35=false; // if you use 3.5mm headphone jack
-hinge_left=false; // if you use left hinge
-hinge_right=true; // if you use right hinge
+hinge_left=true; // if you use left hinge
+hinge_right=false; // if you use right hinge
 
 body();
 stab();
@@ -97,10 +97,10 @@ module body() {
       translate([82.5,-27.5]) cylinder(d=3.3,h=10);
 
       union($fn=6) {
-        translate([-82.5,117.5]) cylinder(d=6.7,h=4.5);
-        translate([-82.5,-27.5]) cylinder(d=6.7,h=4.5);
-        translate([82.5,117.5]) cylinder(d=6.7,h=4.5);
-        translate([82.5,-27.5]) cylinder(d=6.7,h=4.5);
+        translate([-82.5,117.5]) cylinder(d=6.9,h=4.5);
+        translate([-82.5,-27.5]) cylinder(d=6.9,h=4.5);
+        translate([82.5,117.5]) cylinder(d=6.9,h=4.5);
+        translate([82.5,-27.5]) cylinder(d=6.9,h=4.5);
       }
     }