Take the default values for the spinput configuration from CaGe.ini

CaGe.ini

@@ -239,4 +239,14 @@ RasmolViewer.Title:	Rasmol
 # is to be checked for questions requiring a user response
 RasmolViewer.WatchInterval:	500
 
-
+# Spinput writer configuration
+# if the following property is set to true, then all vertices
+# are of the same element type
+Spinput.UseSingleElement:   false
+# if the property above is true, then the following two properties
+# specify the specific element to use for each vertex
+Spinput.ElementNumber:      6
+Spinput.ElementName:        C
+# the next property specify the scaling that needs to be done.
+# Each coordinate will be multiplied with this factor.
+Spinput.scaling:            1.0

cage/writer/SpinputWriterConfigurationHandler.java

@@ -1,5 +1,6 @@
 package cage.writer;
 
+import cage.CaGe;
 import java.awt.GridBagConstraints;
 import java.awt.GridBagLayout;
 import java.awt.Insets;
@@ -54,11 +55,18 @@ public void configureWriter(CaGeWriter writer) {
     }
 
     private static class SpinputWriterConfigurationModel {
-        private boolean useSingleElementRule = false;
-        private int singleElementNumber = 6;
-        private String singleElementName = "C";
+        private boolean useSingleElementRule;
+        private int singleElementNumber;
+        private String singleElementName;
 
-        private float scalingFactor = 1.0f;
+        private float scalingFactor;
+
+        public SpinputWriterConfigurationModel() {
+            useSingleElementRule = CaGe.getCaGePropertyAsBoolean("Spinput.UseSingleElement", false);
+            singleElementNumber = CaGe.getCaGePropertyAsInt("Spinput.ElementNumber", 6);
+            singleElementName = CaGe.getCaGeProperty("Spinput.ElementName", "C");
+            scalingFactor = CaGe.getCaGePropertyAsFloat("Spinput.scaling", 1.0f);
+        }
 
         private final List<SpinputWriterConfigurationModelListener> listeners =
                 new ArrayList<>();