diff --git a/src/Aardvark.Algodat.Tests/Program.cs b/src/Aardvark.Algodat.Tests/Program.cs
index c17ee39b..c900cc16 100644
--- a/src/Aardvark.Algodat.Tests/Program.cs
+++ b/src/Aardvark.Algodat.Tests/Program.cs
@@ -2766,7 +2766,7 @@ public static async Task Main(string[] _)
             await CreateStore(
                 @"W:\Datasets\Vgm\Data\structured_pointclouds\lowergetikum 20230321.e57",
                 @"W:\Datasets\Vgm\Stores\lowergetikum 20230321.e57_0.01",
-                minDist: 0.01
+                minDist: 0.0
                 );
 
             //await Parts_Test_20231006_Merge();
diff --git a/src/Aardvark.Data.E57/ImportE57.cs b/src/Aardvark.Data.E57/ImportE57.cs
index ef44ba82..2afd4035 100644
--- a/src/Aardvark.Data.E57/ImportE57.cs
+++ b/src/Aardvark.Data.E57/ImportE57.cs
@@ -195,7 +195,7 @@ public static IEnumerable<Chunk> Chunks(this Stream stream, long streamLengthInB
                 var yieldedRecordCount = 0L;
 
                 var partIndex = config.PartIndexOffset;
-                foreach (var data3d in header.E57Root.Data3D.Take(2))
+                foreach (var data3d in header.E57Root.Data3D)
                 {
                     foreach (var (Positions, Properties) in data3d.StreamPointsFull(config.MaxChunkPointCount, config.Verbose, exclude))
                     {
diff --git a/src/Aardvark.Geometry.PointSet/Octrees/Lod.cs b/src/Aardvark.Geometry.PointSet/Octrees/Lod.cs
index 3138515d..ea4fd250 100644
--- a/src/Aardvark.Geometry.PointSet/Octrees/Lod.cs
+++ b/src/Aardvark.Geometry.PointSet/Octrees/Lod.cs
@@ -480,9 +480,30 @@ void addAttributeByRef<T>(string kind, Durable.Def def, Func<IPointCloudNode, bo
                 if (lodQs != null)
                 {
                     upsertData = upsertData
-                        .Add(PartIndexUtils.GetDurableDefForPartIndices(lodQs), lodQs)
+                        //.Add(PartIndexUtils.GetDurableDefForPartIndices(lodQs), lodQs)
                         .Add(Durable.Octree.PartIndexRange, lodQsRange ?? throw new Exception($"Expected part index range to be not null. Error d355eb9f-02b3-4cd7-b1de-041d4d0e7c3c."))
                         ;
+
+                    if (lodQs is Array xs)
+                    {
+                        // add attribute by ref to separate blob
+                        var key = Guid.NewGuid();
+                        store?.Add(key, xs);
+                        var def = xs switch
+                        {
+                            byte[] => Durable.Octree.PerPointPartIndex1bReference,
+                            short[] => Durable.Octree.PerPointPartIndex1sReference,
+                            int[] => Durable.Octree.PerPointPartIndex1iReference,
+                            _ => throw new Exception("Invariant 5a25f407-5ccf-4577-a7eb-c0d691093d10.")
+                        };
+                        upsertData = upsertData.Add(def, key);
+                    }
+                    else
+                    {
+                        upsertData = upsertData
+                            .Add(PartIndexUtils.GetDurableDefForPartIndices(lodQs), lodQs)
+                            ;
+                    }
                 }
                 
                 // ... classifications ...