diff --git a/README.md b/README.md
index 027bc50..25e0a93 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@ A ground-up port (with a few extra features) of the stock [gridfinity](https://w
 
 Full documentation can be found at the project's [website](https://kennetek.github.io/gridfinity-rebuilt-openscad/).
 
+The project can also be found on [Printables](https://www.printables.com/model/274917-gridfinity-rebuilt-in-openscad) if you want to support the project.
+
 [<img src="./images/base_dimension.gif" width="320">]()
 [<img src="./images/compartment_dimension.gif" width="320">]()
 [<img src="./images/height_dimension.gif" width="320">]()
diff --git a/gridfinity-constants.scad b/gridfinity-constants.scad
index e56a2b0..174a497 100644
--- a/gridfinity-constants.scad
+++ b/gridfinity-constants.scad
@@ -45,6 +45,8 @@ d_tabh = 15.85;
 d_tabw = 42; 
 // angle of tab   
 a_tab = 36; 
+// lip height
+h_lip = 3.548;
 
 d_wall2 = r_base-r_c1-d_clear*sqrt(2);
 d_magic = -2*d_clear-2*d_wall+d_div; 
diff --git a/gridfinity-rebuilt-bins.scad b/gridfinity-rebuilt-bins.scad
index c1b1b5e..00f2c95 100644
--- a/gridfinity-rebuilt-bins.scad
+++ b/gridfinity-rebuilt-bins.scad
@@ -46,8 +46,8 @@ divy = 1;
 /* [Toggles] */
 // snap gridz height to nearest 7mm increment
 enable_zsnap = false;
-// enable upper lip for stacking other bins
-enable_lip = true;
+// how should the top lip act
+style_lip = 0; //[0: Regular lip, 1:remove lip subtractively, 2: remove lip and retain height]
 
 /* [Other] */
 // determine what the variable "gridz" applies to based on your use case
@@ -72,8 +72,9 @@ div_base_y = 0;
 // ===== IMPLEMENTATION ===== //
 
 color("tomato") {
-gridfinityInit(gridx, gridy, height(gridz, gridz_define, enable_lip, enable_zsnap), height_internal, length) {
+gridfinityInit(gridx, gridy, height(gridz, gridz_define, style_lip, enable_zsnap), height_internal, length) {
 
+    if (divx > 0 && divy > 0)
     cutEqual(n_divx = divx, n_divy = divy, style_tab = style_tab, scoop_weight = scoop);
 }
 gridfinityBase(gridx, gridy, length, div_base_x, div_base_y, style_hole);
diff --git a/gridfinity-rebuilt-utility.scad b/gridfinity-rebuilt-utility.scad
index 74326f4..22131a1 100644
--- a/gridfinity-rebuilt-utility.scad
+++ b/gridfinity-rebuilt-utility.scad
@@ -6,8 +6,8 @@ include <gridfinity-constants.scad>
 // ===== User Modules ===== //
 
 // functions to convert gridz values to mm values
-function hf (z, d, l) = (d==0)?z*7:(d==1)?h_bot+z+h_base:z-(l?3.8:0);
-function height (z,d=0,l=true,s=true) = (s?((abs(hf(z,d,l))%7==0)?hf(z,d,l):hf(z,d,l)+7-abs(hf(z,d,l))%7):hf(z,d,l))-h_base;
+function hf (z, d, l) = ((d==0)?z*7:(d==1)?h_bot+z+h_base:z-((l==1)?h_lip:0))+(l==2?h_lip:0);
+function height (z,d=0,l=0,s=true) = (s?((abs(hf(z,d,l))%7==0)?hf(z,d,l):hf(z,d,l)+7-abs(hf(z,d,l))%7):hf(z,d,l))-h_base;
 
 // Creates equally divided cutters for the bin
 //
@@ -36,7 +36,7 @@ module gridfinityInit(gx, gy, h, h0 = 0, l) {
     }
     color("royalblue") 
     block_wall(gx, gy, l) {
-        if (enable_lip) profile_wall();
+        if (style_lip == 0) profile_wall();
         else profile_wall2();
     } 
     }
@@ -183,6 +183,9 @@ module profile_wall() {
             offset(delta = -r_f1)
             profile_wall_sub();
         }
+        // remove any negtive geometry in edge cases
+        mirror([0,1,0])
+        square(100*length);
     }
 }
 
@@ -222,10 +225,10 @@ module block_cutter(x,y,w,h,t,s) {
     v_ang_tab = a_tab;
     v_ang_lip = 45;
     
-    ycutfirst = y == 0 && enable_lip;
-    ycutlast = abs(y+h-$gyy)<0.001 && enable_lip; 
-    xcutfirst = x == 0 && enable_lip;
-    xcutlast = abs(x+w-$gxx)<0.001 && enable_lip;
+    ycutfirst = y == 0 && style_lip == 0;
+    ycutlast = abs(y+h-$gyy)<0.001 && style_lip == 0; 
+    xcutfirst = x == 0 && style_lip == 0;
+    xcutlast = abs(x+w-$gxx)<0.001 && style_lip == 0;
     zsmall = ($dh+h_base)/7 < 3;
     
     ylen = h*($gyy*length+d_magic)/$gyy-d_div; 
diff --git a/gridfinity-spiral-vase.scad b/gridfinity-spiral-vase.scad
index e1f5fca..46932ee 100644
--- a/gridfinity-spiral-vase.scad
+++ b/gridfinity-spiral-vase.scad
@@ -18,7 +18,7 @@ $fs = 0.25;
 type = 0; // [0:bin, 1:base]
 
 /* [Printer Settings] */
-// printer nozzle size
+// extrusion width (walls will be twice this size)
 nozzle = 0.6; 
 // slicer layer size
 layer = 0.35;
@@ -59,6 +59,7 @@ gridz_define = 0; // [0:gridz is the height of bins in units of 7mm increments -
 // how tabs are implemented
 style_tab = 0; // [0:continuous, 1:broken, 2:auto, 3:right, 4:center, 5:left, 6:none]
 // where to put X cutouts for attaching bases
+// selecting none will also disable crosses on bases
 style_base = 0; // [0:all, 1:corners, 2:edges, 3:auto, 4:none]
    
 // tab angle
@@ -74,7 +75,7 @@ else gridfinityVase(); // Generate the bin
 
 // ===== CONSTRUCTION ===== //
 
-d_bottom = layer*bottom_layer;
+d_bottom = layer*(max(bottom_layer,1));
 x_l = length/2; 
 
 dht = (gridz_define==0)?gridz*7 : (gridz_define==1)?h_bot+gridz+h_base : gridz-(enable_lip?3.8:0);
@@ -147,6 +148,10 @@ module gridfinityVase() {
         block_inset();
         if (enable_pinch)
         block_pinch();
+        
+        if (bottom_layer <= 0)
+        translate([0,0,-50+layer+0.01])
+        cube([gridx*length*10,gridy*length*10,100], center=true);
     }
 }
 
@@ -169,6 +174,7 @@ module gridfinityBaseVase() {
         rotate([0,0,90])
         translate([0,0,-h_base+d_bottom+0.01])
         cube([0.001,length*gridx,d_height+d_bottom*2]);
+
     }
     
     pattern_circular(4)
@@ -191,6 +197,7 @@ module gridfinityBaseVase() {
     cube([length*2, length*2, h_base], center = true);
     }
     
+    if (style_base != 4)
     linear_extrude(d_bottom)
     profile_x(0.1);
 }
@@ -403,17 +410,17 @@ module profile_wall_sub_sub() {
 
 module block_inset() {
     ixx = (gridx*length-0.5)/2;
-    iyy = d_height/2+d_bottom*2;
+    iyy = d_height/1.875;
     izz = sqrt(ixx^2+iyy^2)*tan(40);
     if (enable_scoop_chamfer && enable_inset)
     difference() {
         intersection() {
             rotate([0,90,0])
-            translate([-iyy+d_bottom*2,0,0])
+            translate([-iyy,0,0])
             block_inset_sub(iyy, gridx*length, 45);
 
             rotate([0,90,0])
-            translate([-iyy+d_bottom*2,0,0])
+            translate([-iyy,0,0])
             rotate([0,90,0])
             block_inset_sub(ixx, d_height*2, 45);
         }
@@ -465,14 +472,14 @@ module profile_tabscoop(m) {
 module block_tabscoop(a=m, b=0, c=0, d=-1) {
     translate([0,d_tabh*cos(a_tab)-length*gridy/2+0.25+b,0])
     difference() {
-        translate([0,0,-d_tabh*sin(a_tab)*2+d_height+d_bottom*2])
+        translate([0,0,-d_tabh*sin(a_tab)*2+d_height+2.1])
         profile_tabscoop(a);
         
         translate([-gridx*length/2,-m,-m])
         cube([gridx*length,m-d_tabh*cos(a_tab)+0.005+c,d_height*2]);
         
         if (d >= 0)
-        translate([0,0,-d_tabh*sin(a_tab)+d_height+d_bottom*2+m/2+d])
+        translate([0,0,-d_tabh*sin(a_tab)+d_height+m/2+d+2.1])
         cube([gridx*length,gridy*length,m],center=true);
     }
 }
@@ -483,7 +490,7 @@ module transform_vtab(a=0,b=1) {
 }
 
 module transform_vtab_base(a) {
-    translate([0,d_tabh*cos(a_tab)-length*gridy/2+0.25,-d_tabh*sin(a_tab)+d_height+d_bottom*2])
+    translate([0,d_tabh*cos(a_tab)-length*gridy/2+0.25,-d_tabh*sin(a_tab)+d_height+2.1])
     rotate([90,0,270])
     linear_extrude(a, center=true)
     children();
@@ -506,7 +513,7 @@ module block_tab_base(del) {
 module transform_scoop() {
     intersection() {
         block_vase();
-        translate([0,gridy*length/2-d_ramp,1.21])
+        translate([0,gridy*length/2-d_ramp,layer*max(bottom_layer*1)])
         rotate([90,0,90])
         linear_extrude(2*length*gridx,center=true)
         children();