Want to replace the 3 white dot sights on this gun . Was looking at XS sight systems for their big dot simplicity. However it is not compatible , too short a barrel . Any other recommendations here Also am concerned about fitment, was told I have a Novak type cut on this gun and all 1911 styles are not the same . Does anyone have this particular gun and what did you use when you changed sights . If possible a link to the correct sights would be appreciated. Could not get a response from S&W except they don;t have other replacements . Greatly appreciated.