Slot from Stratus

Adaptation/FileHandlers/QS408M/TXT.cs

@@ -64,6 +64,9 @@ public class TXT
         string line = GetToEOL();
         ScanPast("thickness");
         string radialVariationThickness = GetToEOL();
+        _ = GetToEOL();
+        ScanPast("Slot:");
+        string slot = GetBefore(";");
         Header = new()
         {
             Title = title,
@@ -85,6 +88,7 @@ public class TXT
         {
             Line = line,
             RadialVariationThickness = radialVariationThickness,
+            Slot = slot,
         };
     }