Wow, Sketchup.read_default and Sketchup.write_default were easy to implement. Attaching the defaults to individual models can also be advantageous, and I will have to think about the best way to save user defaults. Thanks guys.
a_values=[] s_value="" s_value = Sketchup.read_default "honoluludesktop","values","None:Inches:Model:to Faces:by Number" a_values = s_value.split(":") . . results = inputbox prompts,a_values,enums,my_file_name+" Options" . . a_values = ["None",scale_sel,origin_sel,dface_sel,material_sel] s_value = a_values.join(":") result = Sketchup.write_default "honoluludesktop","values",s_value