diff --git a/LiftLog.Ui/Models/Utils.cs b/LiftLog.Ui/Models/Utils.cs
index bf2ff3b8..8951f2c8 100644
--- a/LiftLog.Ui/Models/Utils.cs
+++ b/LiftLog.Ui/Models/Utils.cs
@@ -25,25 +25,11 @@ public static implicit operator DecimalValue(decimal value)
         return new DecimalValue(units, nanos);
     }
 
-    public static implicit operator decimal?(DecimalValue? grpcDecimal)
-    {
-        if (grpcDecimal is null)
-        {
-            return null;
-        }
-        return grpcDecimal.Units + grpcDecimal.Nanos / NanoFactor;
-    }
+    public static implicit operator decimal?(DecimalValue? grpcDecimal) =>
+        grpcDecimal is null ? null : (decimal)grpcDecimal;
 
-    public static implicit operator DecimalValue?(decimal? value)
-    {
-        if (value is null)
-        {
-            return null;
-        }
-        var units = decimal.ToInt64(value.Value);
-        var nanos = decimal.ToInt32((value.Value - units) * NanoFactor);
-        return new DecimalValue(units, nanos);
-    }
+    public static implicit operator DecimalValue?(decimal? value) =>
+        value is null ? null : (DecimalValue)value.Value;
 }
 
 internal partial class DateOnlyDao
@@ -60,13 +46,11 @@ public DateOnlyDao(int year, int month, int day)
     public static implicit operator DateOnlyDao(DateOnly model) =>
         new(model.Year, model.Month, model.Day);
 
-    public static implicit operator DateOnlyDao?(DateOnly? model) =>
-        model is null
-            ? null
-            : new DateOnlyDao(model.Value.Year, model.Value.Month, model.Value.Day);
-
     public static implicit operator DateOnly?(DateOnlyDao? dao) =>
-        dao is null ? null : new DateOnly(dao.Year, dao.Month, dao.Day);
+        dao is null ? null : (DateOnly)dao;
+
+    public static implicit operator DateOnlyDao?(DateOnly? value) =>
+        value is null ? null : (DateOnlyDao)value.Value;
 }
 
 internal partial class TimeOnlyDao
@@ -85,18 +69,11 @@ public static implicit operator TimeOnly(TimeOnlyDao dao) =>
     public static implicit operator TimeOnlyDao(TimeOnly model) =>
         new(model.Hour, model.Minute, model.Second, model.Millisecond);
 
-    public static implicit operator TimeOnlyDao?(TimeOnly? model) =>
-        model is null
-            ? null
-            : new TimeOnlyDao(
-                model.Value.Hour,
-                model.Value.Minute,
-                model.Value.Second,
-                model.Value.Millisecond
-            );
-
     public static implicit operator TimeOnly?(TimeOnlyDao? dao) =>
-        dao is null ? null : new TimeOnly(dao.Hour, dao.Minute, dao.Second, dao.Millisecond);
+        dao is null ? null : (TimeOnly)dao;
+
+    public static implicit operator TimeOnlyDao?(TimeOnly? value) =>
+        value is null ? null : (TimeOnlyDao)value.Value;
 }
 
 internal partial class UUIDDao
@@ -111,8 +88,7 @@ public UUIDDao(Guid value)
     public static implicit operator Guid(UUIDDao dao) => new(dao.Value.ToByteArray());
 
     public static implicit operator UUIDDao?(Guid? value) =>
-        value is null ? null : new UUIDDao(value.Value);
+        value is null ? null : (UUIDDao)value.Value;
 
-    public static implicit operator Guid?(UUIDDao? dao) =>
-        dao is null ? null : new Guid(dao.Value.ToByteArray());
+    public static implicit operator Guid?(UUIDDao? dao) => dao is null ? null : (Guid)dao;
 }