diff --git a/split_reel.scad b/split_reel.scad
index bbd5176..1a09458 100644
--- a/split_reel.scad
+++ b/split_reel.scad
@@ -21,7 +21,7 @@ module threaded_core (pos = [0, 0, 0], format = "16mm") {
         if (format == "16mm") {
             union () {
                 cylinder(r = R(Core16mm), h = 6, center = true);
-                thread_16mm([0, 0, 0], length = 11, chamfer = true);
+                thread_16mm([0, 0, 1.5], length = 14, chamfer = true);
             }  
         }
     }