diff --git a/Expanded_3DPrintable_CustomThreads.py b/Expanded_3DPrintable_CustomThreads.py
new file mode 100644
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+++ b/Expanded_3DPrintable_CustomThreads.py
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+# ============================================================
+# 🚀 USER INPUT SECTION — START HERE
+# Change the values below to customize your thread generation
+# ============================================================
+
+# 🔧 Pitch range settings (in millimeters)
+pitch_start = 1.0     # Starting pitch value (e.g., 1.0 mm)
+pitch_end = 6.0       # Ending pitch value (e.g., 6.0 mm)
+pitch_step = 0.5      # Interval between pitches (e.g., 0.5 mm)
+
+# 📏 Thread diameters to include (in millimeters)
+thread_sizes = list(range(8, 51))  # Diameters from 8 mm to 50 mm
+
+# ⚙️ Tolerance offsets to simulate different thread classes
+tolerance_offsets = [0.0, 0.1, 0.2, 0.4, 0.8]
+
+# 🧾 Output file name
+output_filename = "3DPrintedMetricThreads.xml"
+
+# 📋 Metadata for the thread type
+thread_name = "3D-Printed Metric Threads V3"
+unit = "mm"
+thread_angle = 60.0  # Standard ISO metric thread angle
+
+# ============================================================
+# 🚫 USER INPUT SECTION — END HERE
+# You don't need to change anything below this line
+# ============================================================
+
+import math
+import xml.etree.ElementTree as ET
+from abc import ABC, abstractmethod
+
+# 🔢 Generate pitch values from user-defined range
+def generate_pitch_list(start, end, step):
+    pitches = []
+    current = start
+    while current <= end + 1e-9:
+        pitches.append(round(current, 4))
+        current += step
+    return pitches
+
+# 🧼 Format numbers for display (e.g., 5.0 → "5")
+def format_number(val):
+    return str(int(val)) if val == int(val) else str(val)
+
+# 🧵 Thread object to store calculated dimensions
+class Thread:
+    def __init__(self):
+        self.gender = None
+        self.thread_class = None
+        self.major_dia = 0.0
+        self.pitch_dia = 0.0
+        self.minor_dia = 0.0
+        self.tap_drill = None
+
+# 🧩 Abstract base class for thread profiles
+class ThreadProfile(ABC):
+    @abstractmethod
+    def sizes(self):
+        pass
+
+    @abstractmethod
+    def designations(self, size):
+        pass
+
+    @abstractmethod
+    def threads(self, designation):
+        pass
+
+# 🧵 Metric thread generator class
+class MetricThreadGenerator(ThreadProfile):
+    class Designation:
+        def __init__(self, diameter, pitch):
+            self.nominal_diameter = diameter
+            self.pitch = pitch
+            self.name = f"M{format_number(diameter)}x{format_number(pitch)}"
+
+    def __init__(self, pitch_list):
+        self.pitches = pitch_list
+
+    def sizes(self):
+        return thread_sizes
+
+    def designations(self, size):
+        return [self.Designation(size, pitch) for pitch in self.pitches]
+
+    def threads(self, designation):
+        threads = []
+        P = designation.pitch
+        D = designation.nominal_diameter
+        H = (P / 2) / math.tan(math.radians(thread_angle / 2))
+        pitch_dia = D - 2 * (3 * H / 8)
+        minor_dia = D - 2 * (5 * H / 8)
+
+        for offset in tolerance_offsets:
+            class_label = f"O.{str(offset)[2:]}"  # e.g., 0.1 → "O.1"
+
+            # External thread
+            ext = Thread()
+            ext.gender = "external"
+            ext.thread_class = class_label
+            ext.major_dia = D - offset
+            ext.pitch_dia = pitch_dia - offset
+            ext.minor_dia = minor_dia - offset
+            threads.append(ext)
+
+            # Internal thread
+            int_thread = Thread()
+            int_thread.gender = "internal"
+            int_thread.thread_class = class_label
+            int_thread.major_dia = D + offset
+            int_thread.pitch_dia = pitch_dia + offset
+            int_thread.minor_dia = minor_dia + offset
+            int_thread.tap_drill = D - P
+            threads.append(int_thread)
+
+        return threads
+
+# 🧾 XML generator function
+def generate_xml():
+    pitch_list = generate_pitch_list(pitch_start, pitch_end, pitch_step)
+    profile = MetricThreadGenerator(pitch_list)
+
+    root = ET.Element("ThreadType")
+    tree = ET.ElementTree(root)
+
+    # Add metadata
+    ET.SubElement(root, "Name").text = thread_name
+    ET.SubElement(root, "CustomName").text = thread_name
+    ET.SubElement(root, "Unit").text = unit
+    ET.SubElement(root, "Angle").text = str(thread_angle)
+    ET.SubElement(root, "SortOrder").text = "3"
+
+    # Add thread sizes and designations
+    for size in profile.sizes():
+        size_elem = ET.SubElement(root, "ThreadSize")
+        ET.SubElement(size_elem, "Size").text = str(size)
+        for designation in profile.designations(size):
+            des_elem = ET.SubElement(size_elem, "Designation")
+            ET.SubElement(des_elem, "ThreadDesignation").text = designation.name
+            ET.SubElement(des_elem, "CTD").text = designation.name
+            ET.SubElement(des_elem, "Pitch").text = str(designation.pitch)
+            for thread in profile.threads(designation):
+                thread_elem = ET.SubElement(des_elem, "Thread")
+                ET.SubElement(thread_elem, "Gender").text = thread.gender
+                ET.SubElement(thread_elem, "Class").text = thread.thread_class
+                ET.SubElement(thread_elem, "MajorDia").text = f"{thread.major_dia:.4g}"
+                ET.SubElement(thread_elem, "PitchDia").text = f"{thread.pitch_dia:.4g}"
+                ET.SubElement(thread_elem, "MinorDia").text = f"{thread.minor_dia:.4g}"
+                if thread.tap_drill is not None:
+                    ET.SubElement(thread_elem, "TapDrill").text = f"{thread.tap_drill:.4g}"
+
+    ET.indent(tree)
+    tree.write(output_filename, encoding="UTF-8", xml_declaration=True)
+
+# 🚀 Run the generator
+if __name__ == "__main__":
+    generate_xml()
+    print(f"✅ XML file '{output_filename}' created for pitches from {pitch_start} mm to {pitch_end} mm in {pitch_step} mm steps.")
+