I have just retired my old reliable Walther PPK that I have carried for 32 years in a shoulder hoster. It has been replaced by a SA XD 45 ACP Tactical (5" barrel). I have bought a good waist holster that I carry it in. What I really want is a comfortable shoulder rig for the XD. Anyone have any recommendations? I am massively right handed and have always carried under my left arm. Any info appreciated.