diff --git a/Gu.Units.Generator/Descriptors/Settings.cs b/Gu.Units.Generator/Descriptors/Settings.cs
index f8d8f877..d040ce27 100644
--- a/Gu.Units.Generator/Descriptors/Settings.cs
+++ b/Gu.Units.Generator/Descriptors/Settings.cs
@@ -134,7 +134,7 @@ public static Settings FromFile(string fullFileName)
                 return settings;
             }
         }
-        
+
         private void Initialize()
         {
             foreach (var unit in SiUnits)
@@ -158,20 +158,14 @@ private void Initialize()
                     }
                 }
             }
-            foreach (var quantity in Quantities.Where(x => x.Unit is DerivedUnit))
+            foreach (var left in Quantities)
             {
-                var derivedUnit = quantity.Unit as DerivedUnit;
-                var unitParts = derivedUnit.Parts;
-                foreach (var up in unitParts)
+                var tmp = left;
+                foreach (var result in Quantities.Where(x => x != tmp))
                 {
-                    if (up.Power > 0)
+                    if (OperatorOverload.CanCreate(left, result))
                     {
-                        var left = up.Unit.Quantity;
-                        if (OperatorOverload.CanCreate(left, quantity))
-                        {
-                            left.OperatorOverloads.Add(new OperatorOverload(left, quantity));
-                            quantity.OperatorOverloads.Add(new OperatorOverload(quantity, left));
-                        }
+                        left.OperatorOverloads.Add(new OperatorOverload(left, result));
                     }
                 }
             }
diff --git a/Gu.Units.Generator/WpfStuff/UnitPartsConverter.cs b/Gu.Units.Generator/WpfStuff/UnitPartsConverter.cs
index 671cdcb1..4f1b7665 100644
--- a/Gu.Units.Generator/WpfStuff/UnitPartsConverter.cs
+++ b/Gu.Units.Generator/WpfStuff/UnitPartsConverter.cs
@@ -1,6 +1,7 @@
 namespace Gu.Units.Generator.WpfStuff
 {
     using System;
+    using System.Collections.Generic;
     using System.ComponentModel;
     using System.Globalization;
     using System.Linq;
@@ -10,7 +11,7 @@
 
     public class UnitPartsConverter : TypeConverter
     {
-        private static string[] superscripts = { "¹", "²", "³" };
+        private static readonly string[] Superscripts = { "¹", "²", "³" };
         public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
         {
             return sourceType == typeof(string);
@@ -27,31 +28,14 @@ public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo c
             {
                 return null;
             }
-            int sign = 1;
             var s = (string)value;
-            //s = s.Replace("⋅", "*");
             if (string.IsNullOrWhiteSpace(s))
             {
                 return null;
             }
-            var symbols = UnitBase.AllUnitsStatic.Select(x => x.Symbol).ToArray();
-            var symbolsPattern = string.Join("|", new[] { "1" }.Concat(symbols));
-            var superscriptsPattern = string.Join("|", superscripts);
-            var pattern = string.Format(
-@"(?<Unit>
-    (?<Symbol>({0}))
-    (?<Power>
-        ((?:\^)[\+\-]?\d+)
-        |
-        (⁻?({1}))
-    )?
-    |
-    (?<Op>[⋅\*\/])
-)", symbolsPattern, superscriptsPattern);
-            var matches = Regex.Matches(s, pattern, RegexOptions.IgnorePatternWhitespace)
-                               .OfType<Match>()
-                               .ToArray();
+            var matches = Parse(s);
             var parts = new UnitParts();
+            int sign = 1;
             bool expectsSymbol = true;
             foreach (Match match in matches)
             {
@@ -84,12 +68,32 @@ public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo c
                     }
                     expectsSymbol = true;
                 }
-                //capture["Unit"]
-                //parts.Add([""]);
             }
             return parts;
         }
 
+        private static IEnumerable<Match> Parse(string s)
+        {
+            var symbols = UnitBase.AllUnitsStatic.Select(x => x.Symbol).ToArray();
+            var symbolsPattern = string.Join("|", new[] { "1" }.Concat(symbols));
+            var superscriptsPattern = string.Join("|", Superscripts);
+            var pattern = string.Format(
+                @"(?<Unit>
+    (?<Symbol>({0}))
+    (?<Power>
+        ((?:\^)[\+\-]?\d+)
+        |
+        (⁻?({1}))
+    )?
+    |
+    (?<Op>[⋅\*\/])
+)", symbolsPattern, superscriptsPattern);
+            var matches = Regex.Matches(s, pattern, RegexOptions.IgnorePatternWhitespace)
+                               .OfType<Match>()
+                               .ToArray();
+            return matches;
+        }
+
         public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
         {
             return value == null ? null : ((UnitParts)value).Expression;
@@ -103,14 +107,14 @@ private int ParsePower(string power)
             }
             if (power[0] == '⁻')
             {
-                var indexOf = Array.IndexOf(superscripts, power.Substring(1));
+                var indexOf = Array.IndexOf(Superscripts, power.Substring(1));
                 if (indexOf < 0)
                 {
                     throw new FormatException();                    
                 }
                 return -1*(indexOf + 1);
             }
-            int p =  Array.IndexOf(superscripts, power) + 1;
+            int p =  Array.IndexOf(Superscripts, power) + 1;
             if (p > 0)
             {
                 return p;