diff --git a/gridfinity-rebuilt-lite.scad b/gridfinity-rebuilt-lite.scad
index 6ed4139..2278bbd 100644
--- a/gridfinity-rebuilt-lite.scad
+++ b/gridfinity-rebuilt-lite.scad
@@ -48,6 +48,8 @@ style_hole = 0; // [0:no holes, 1:magnet holes only, 2: magnet and screw holes -
 div_base_x = 0;
 // number of divisions per 1 unit of base along the Y axis. (default 1, only use integers. 0 means automatically guess the right division)
 div_base_y = 0; 
+// thickness of bottom layer
+bottom_layer = 1;
 
 
 // ===== IMPLEMENTATION ===== //
@@ -79,6 +81,8 @@ module gridfinityLite(gridx, gridy, gridz, gridz_define, style_lip, enable_zsnap
                     }
                     translate([0,0,-1])
                     rounded_rectangle(gridx*length-0.5005-d_wall*2, gridy*length-0.5005-d_wall*2, 1000, r_f2);
+                    translate([0,0,bottom_layer])
+                    rounded_rectangle(gridx*1000, gridy*1000, 1000, r_f2);
                 }
                 translate([0,0,h_base+d_clear])
                 rounded_rectangle(gridx*length-0.5005-d_wall*2, gridy*length-0.5005-d_wall*2, h_base, r_f2);