BasedBox: Add description and point people to edge_width

boxes/generators/basedbox.py

@@ -22,6 +22,11 @@ class BasedBox(Boxes):
 
     ui_group = "Box"
 
+    description = """This box is more of a building block than a finished item.
+Use a vector graphics programm (like Inkscape) to add holes or adjust the base
+plate. The width of the "brim" can also be adjusted with the **edge_width**
+ parameter in the **Finger Joints Settings**."""
+
     def __init__(self):
         Boxes.__init__(self)
         self.addSettingsArgs(edges.FingerJointSettings)