diff --git a/ApplicationView/ApplicationController.cs b/ApplicationView/ApplicationController.cs
index a31a070e6..fbb030ec9 100644
--- a/ApplicationView/ApplicationController.cs
+++ b/ApplicationView/ApplicationController.cs
@@ -1143,28 +1143,6 @@ namespace MatterHackers.MatterControl
 			}
 		}
 
-		public string ComputeFileSha1(string filePath)
-		{
-			using (var stream = File.OpenRead(filePath))
-			{
-				return GenerateSha1(stream);
-			}
-		}
-
-		private string GenerateSha1(Stream stream)
-		{
-			// var timer = Stopwatch.StartNew();
-			using (var sha1 = System.Security.Cryptography.SHA1.Create())
-			{
-				byte[] hash = sha1.ComputeHash(stream);
-				string SHA1 = BitConverter.ToString(hash).Replace("-", String.Empty);
-
-				// Console.WriteLine("{0} {1} {2}", SHA1, timer.ElapsedMilliseconds, filePath);
-				return SHA1;
-			}
-		}
-
-
 		/// <summary>
 		/// Compute hash for string encoded as UTF8
 		/// </summary>
diff --git a/Properties/AssemblyInfo.cs b/Properties/AssemblyInfo.cs
index ece2d026b..ba392cf60 100644
--- a/Properties/AssemblyInfo.cs
+++ b/Properties/AssemblyInfo.cs
@@ -22,6 +22,7 @@ using System.Runtime.InteropServices;
 
 [assembly: InternalsVisibleTo("MatterControl.Tests")]
 [assembly: InternalsVisibleTo("MatterControl.AutomationTests")]
+[assembly: InternalsVisibleTo("CloudServices.Tests")]
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("1558c103-dff3-49bd-854b-97d57339d662")]
diff --git a/Queue/PrintItemWrapper.cs b/Queue/PrintItemWrapper.cs
index 78500f591..d1b3a6df0 100644
--- a/Queue/PrintItemWrapper.cs
+++ b/Queue/PrintItemWrapper.cs
@@ -33,6 +33,7 @@ using System.Globalization;
 using System.IO;
 using MatterHackers.Agg;
 using MatterHackers.Agg.UI;
+using MatterHackers.DataConverters3D;
 using MatterHackers.Localizations;
 using MatterHackers.MatterControl.DataStorage;
 using MatterHackers.MatterControl.Library;
@@ -102,7 +103,7 @@ namespace MatterHackers.MatterControl.PrintQueue
 			{
 				if (File.Exists(this.FileLocation))
 				{
-					return ApplicationController.Instance.ComputeFileSha1(this.FileLocation);
+					return Object3D.ComputeSHA1(this.FileLocation);
 				}
 
 				return "file-missing";
diff --git a/SlicerConfiguration/Settings/PrinterSettings.cs b/SlicerConfiguration/Settings/PrinterSettings.cs
index 155300e1c..4894c6506 100644
--- a/SlicerConfiguration/Settings/PrinterSettings.cs
+++ b/SlicerConfiguration/Settings/PrinterSettings.cs
@@ -39,6 +39,7 @@ using System.Threading.Tasks;
 using MatterHackers.Agg;
 using MatterHackers.Agg.Platform;
 using MatterHackers.Agg.UI;
+using MatterHackers.DataConverters3D;
 using MatterHackers.Localizations;
 using MatterHackers.MatterControl.ContactForm;
 using MatterHackers.MatterControl.SettingsManagement;
@@ -335,29 +336,6 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 
 		public List<string> MaterialSettingsKeys { get; set; } = new List<string>();
 
-		private string GenerateSha1()
-		{
-			// Maybe be UTF8 encoded, may not...
-			using (var fileStream = new FileStream(DocumentPath, FileMode.Open))
-			using (var bufferedStream = new BufferedStream(fileStream, 1200000))
-			{
-				return GenerateSha1(bufferedStream);
-			}
-		}
-
-		private string GenerateSha1(Stream stream)
-		{
-			// var timer = Stopwatch.StartNew();
-			using (var sha1 = System.Security.Cryptography.SHA1.Create())
-			{
-				byte[] hash = sha1.ComputeHash(stream);
-				string SHA1 = BitConverter.ToString(hash).Replace("-", String.Empty);
-
-				// Console.WriteLine("{0} {1} {2}", SHA1, timer.ElapsedMilliseconds, filePath);
-				return SHA1;
-			}
-		}
-
 		[JsonIgnore]
 		public string DocumentPath => ProfileManager.Instance.ProfilePath(this.ID);
 
@@ -384,7 +362,7 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 				var printerInfo = ProfileManager.Instance[this.ID];
 				if (printerInfo != null)
 				{
-					printerInfo.ContentSHA1 = this.ComputeSha1(json);
+					printerInfo.ContentSHA1 = this.ComputeSHA1(json);
 					ProfileManager.Instance.Save();
 				}
 
@@ -397,17 +375,17 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 			}
 		}
 
-		public string ComputeSha1()
+		internal string ComputeSHA1()
 		{
-			return ComputeSha1(this.ToJson());
+			return ComputeSHA1(this.ToJson());
 		}
 
-		private string ComputeSha1(string json)
+		private string ComputeSHA1(string json)
 		{
 			// SHA1 value is based on UTF8 encoded file contents
 			using (var memoryStream = new MemoryStream(Encoding.UTF8.GetBytes(json)))
 			{
-				return GenerateSha1(memoryStream);
+				return Object3D.ComputeSHA1(memoryStream);
 			}
 		}