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diff --git a/bubblemachine.scad~ b/bubblemachine.scad~
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+second=70;
+r_final_gear=second/2 - 5;
+r_motor_gear=3;
+
+bublator_width=0.4 * second;
+bublator_length=2*r_final_gear;
+
+r_hat=150/2;
+
+// dimensions of the nails used as pins and axis
+r_nail=1.4/2;
+r_nail_head=2.5/2;
+
+$fn=100;
+
+module nail_rail() {
+    cube([5, 200, 2], center=true);
+    translate([0, 0, -1.99]) cube([2, 200, 2], center=true);
+}
+
+module motor_gear(angle=0) {
+  r=r_motor_gear;
+  rotate(angle)
+  difference() {
+    // the actual gear
+    cylinder(r=r, h=5, center=true);
+
+    // pulley rim
+    difference() {
+      cylinder(r=r+1, h=3, center=true);
+      cylinder(r=r-0.5, h=5, center=true); 
+    }
+    difference() {
+      cylinder(r=r+1, h=2, center=true);
+      cylinder(r=r-1.0, h=5, center=true); 
+    }
+
+    // central nail hole
+    cylinder(r=r_nail, h=100, center=true);
+    translate([0, 0, -4]) cylinder(r=r_nail_head, h=2);
+  }
+}
+
+module final_gear(angle=0) {
+  r=r_final_gear;
+  rotate(angle)
+  difference() {
+    // the actual gear
+    cylinder(r=r, h=5, center=true);
+
+    // pulley rim
+    difference() {
+      cylinder(r=r+1, h=3, center=true);
+      cylinder(r=r-0.5, h=5, center=true); 
+    }
+    difference() {
+      cylinder(r=r+1, h=2, center=true);
+      cylinder(r=r-1.0, h=5, center=true); 
+    }
+
+    // air hole
+    translate([0, -r/2, 0])
+    cylinder(r=0.4 * bublator_width, h=10, center=true);
+
+    // excentrical nail hole
+    translate([0, r-3, 0]) {
+      cylinder(r=r_nail, h=100, center=true);
+      translate([0, 0, 1]) cylinder(r=r_nail_head, h=2);
+    }
+
+    // central nail hole
+    cylinder(r=r_nail, h=100, center=true);
+    translate([0, 0, -4]) cylinder(r=r_nail_head, h=2);
+  }
+}
+
+module bublator(angle=0) {
+  r=bublator_width;
+  color([0, 0.7, 0])
+  translate([0, (r_final_gear-3) * (cos(angle) - 1), 0])
+  difference() {
+    union() {
+      cube([bublator_width, bublator_length, 5], center=true);
+      translate([0, bublator_length/2 - 3, 0]) cube([r_final_gear*2 + 5, 10, 5], center=true);
+    }
+
+    // bubble hole
+    translate([0, r_final_gear/2 - bublator_length/2, 0]) {
+      cylinder(r=0.4 * bublator_width, h=10, center=true);
+
+      // nipple array ... hooray
+      for (i = [1:30])
+      for (j = [-1,1])
+      rotate(i * 360/30)
+      translate([0, 0.4 * bublator_width - 0.5, 0])
+      rotate([90 + j*70, 0, 0])
+      rotate([0, 0, 45])
+      cylinder(r1=0, r2=3.5, h=6, center=true, $fn=100);
+    }
+
+    // nail hole
+    translate([0, bublator_length/2 - 3, 0])
+    cube([2*(r_final_gear - 2), 2.5 * r_nail, 50], center=true);
+  }
+}
+
+module assembly_clearance() {
+  translate([0, 18, -1])
+  linear_extrude(170)
+  minkowski() {
+    square(0.3, center=true);
+
+    projection()
+    rotate([90,0,0]) moving_assembly();
+  }
+}
+
+module arc(r, d) {
+  intersection() {
+    translate([0, -r + d, 0]) circle(r);
+    translate([0, 500]) square([1000, 1000], center=true);
+  }
+}
+
+module tank() {
+  color([0.3, 0.3, 0.9])
+  translate([0, -18, -2*r_final_gear])
+  difference() {
+    union() {
+      // bottom
+      linear_extrude(1.5) arc(r_hat, 30);
+
+      // flooding protection floor
+      translate([0, 0, 2*r_final_gear - 2])
+      linear_extrude(1.5) arc(r_hat, 30);
+
+      // walls
+      linear_extrude(4 * r_final_gear + 2)
+      difference() {
+        arc(r_hat, 30);
+        translate([0, 1.5, 0]) arc(r_hat, 27);	
+      }
+
+      // bublator_rails
+      for (i = [-1,1])
+      translate([i*r_final_gear, 18, 2*r_final_gear + 0.5])
+      rotate(-i*25)
+      cube([10, 10, 4*r_final_gear], center=true);
+
+      // gear holding protrusion
+      translate([0,0,1.6*r_final_gear])
+      intersection() {
+	rotate([-90, 0, 0])	
+        translate([0, -20, 0])
+	cylinder(r=r_final_gear, h=70, center=true);
+
+	translate([0, 5, 30])
+	cube([100, 9.7, 40], center=true);
+      }
+    }
+
+    // rear air hole
+    translate([0,0,1.6*r_final_gear])
+    rotate([-90, 0, 0])	
+    translate([0, -27, 0])
+    cylinder(r=0.4*r_final_gear, h=50, center=true);
+
+    // front air hole
+    translate([0,0,1.6*r_final_gear])
+    rotate([-90, 0, 0])	
+    translate([0, -27, 30])
+    rotate([30, 0, 0])
+    cylinder(r1=0.31*r_final_gear, r2=0.85*r_final_gear, h=30, center=true);
+
+    assembly_clearance();
+
+    // pulley clearance
+    translate([-r_final_gear - 90, 11, 2*r_final_gear])
+    cube([100, 3, 2*r_final_gear - 2]);
+
+    // gear axis hole
+    translate([0, 20, 3 * r_final_gear])
+    rotate([90, 0, 0])
+    cylinder(r=r_nail, h=100);
+
+    // bublator screw assembly hole
+    translate([0, 0, 4*r_final_gear])
+    rotate([90, 0, 0])
+    #cylinder(r=20, h=30, center=true);
+  }
+}
+
+module cage() {
+  linear_extrude(2*r_final_gear)
+  assembly_clearance();
+
+  tank();
+}
+
+module moving_assembly(angle=0) {
+  // distance 0.25 mm between objects
+  translate([0, 0, 5.25]) final_gear(a);
+  translate([0, -bublator_length/2 + second/2 - 5, 0]) bublator(a);
+}
+
+a=0;//$t * 1000;
+
+translate([0, 0, r_final_gear])
+rotate([90, 0, 0])
+moving_assembly(a);
+tank();
+
+translate([-70, -5, r_final_gear - 20])
+rotate([90, 0, 0])
+motor_gear();
+
+! tank();
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