Singleton doubt

Hi Experts,

I have doubt in singleton. Recently I have created a singleton class for my program using a class-constructor as given below -

CLASS lcl_zus_r5071_dyn DEFINITION CREATE PRIVATE.
PUBLIC SECTION.
  CLASS-METHODS: class_constructor,
                                   get_instance EXPORTING r_factory TYPE REF TO lcl_zus_r5071_dyn.

   ...

PRIVATE SECTION.
  CLASS-DATA: factory_instance TYPE REF TO lcl_zus_r5071_dyn.
ENDCLASS.

CLASS lcl_zus_r5071_dyn IMPLEMENTATION.   

* Create Instance
  METHOD class_constructor.
    CREATE OBJECT factory_instance.
  ENDMETHOD.                    "class_constructor

* Send instance to Client -
  METHOD get_instance.
    r_factory = factory_instance.
  ENDMETHOD.            

then I get the  object reference using below code in client program -

INITIALIZATION.
* Create single tones -
lcl_zus_r5071_dyn=>get_instance( IMPORTING r_factory = go_sel ).

My doubt arise when I saw SAP help and other forum threads for creating singleton. Every blog suggest to use only a static method for both creation of object and sending the same object to caller. Thus I would like to know is there any potential design issue if I use first static constructor for object creation and then a static method to send the reference ?