diff --git a/OSCCollar/OSCCollar.cs b/OSCCollar/OSCCollar.cs
index 1af65f4..44cc124 100644
--- a/OSCCollar/OSCCollar.cs
+++ b/OSCCollar/OSCCollar.cs
@@ -21,7 +21,7 @@ public class OSCCollar
     private static readonly TimeSpan ConsoleUpdateInterval = TimeSpan.FromMilliseconds(100);
     private static readonly TimeSpan UpdateInterval = TimeSpan.FromMilliseconds(1);
     private static readonly TimeSpan MessageMinInterval = TimeSpan.FromMilliseconds(400);
-    private double radius;
+    private readonly double _radius;
     private GPS GPS1 { get; init; }
     private GPS GPS2 { get; init; }
     private GPS GPS3 { get; init; }
@@ -36,7 +36,7 @@ public class OSCCollar
 
     private OSCCollar(string ip = "127.0.0.1", int portReceive = 9001, int portSend = 9000, double radius = 100, double calibrationX = 0, double calibrationY = 0, bool skipSetup = true)
     {
-        this.radius = radius;
+        this._radius = radius;
         this.GPS1 = new(0, -radius);
         this.GPS2 = new(-(radius * 0.866), radius / 2);
         this.GPS3 = new(radius * 0.866, radius / 2);
@@ -125,17 +125,17 @@ public class OSCCollar
 
     private void GPS1Handle(OscMessageValues messageValues)
     {
-        this.GPS1.Distance = messageValues.ReadFloatElement(0) * radius;
+        this.GPS1.Distance = messageValues.ReadFloatElement(0) * _radius;
     }
     
     private void GPS2Handle(OscMessageValues messageValues)
     {
-        this.GPS2.Distance = messageValues.ReadFloatElement(0) * radius;
+        this.GPS2.Distance = messageValues.ReadFloatElement(0) * _radius;
     }
     
     private void GPS3Handle(OscMessageValues messageValues)
     {
-        this.GPS3.Distance = messageValues.ReadFloatElement(0) * radius;
+        this.GPS3.Distance = messageValues.ReadFloatElement(0) * _radius;
     }
     
     private void CollarStretchHandle(OscMessageValues messageValues)