I sincerely do not believe that any Kydex holster carried at 3 to 5 o'clock position will not print under a T shirt or polo shirt. That maybe true if you stand still, but if you move, the thickness of the pistol (RAMI) with added Kydex will push the gun away sufficiently to show you are armed. There is just no way around it. The main reason is that the pistol is still pretty high above the waist and with or without the claw it will show through clothing during normal daily activities, not to mention bending down, reaching up etc.
The only way to hide the gun in this position is to lower it, that is push is a bit deeper into the waist - sufficiently to still be able get a full grip but low enough to hide the width and a part of the grip. Kydex holsters do not allow to place it low enough.
Sorry, tried it hundreds of times with a variety of compact and full size guns. Only a small pistol 380 or 32, thin enough will stay hidden, and lets not kid ourselves, RAMI, although a great gun is hardly a subcompact. The thinner and more flexible the holster, the better "hidden" aspect of carry. I rather have a very thin holster even if re-holstering would require pulling it from the waist. You may also want to try Urban Carry which keeps the gun below the waistline, but that requires a lot of practice.