I think the grooved rings looked great, though the tall drip tip fitting on the original Lochaber prototyped looked silly. I might have to find out how to fade out the writing on the side of the 18650 SS tube without changing the finish of the tube overall by polishing it and causing it to not match the finish of the other components. I never considered a copper sleeve as I was turned off by all the comment that people make of copper mods making your hands smell, and how quickly many of them seemed to tarnish. Though half of them are probably using cheap clones and I'm sure you can lacquer, or similar, a mod to protect its finish.