Copper HF-R
I love Guy's products - this is my third of his lights. I just got my charger and copper HF-R today.
The light is stunning - the new 5-level controls work perfectly and feel microscope-grade, and the High beam is amazing - even brighter than the alum. HF-R it is replacing on my keychain. The single-trit installation is perfect. It's not light-weight, but feels very sturdy - almost mil-spec, and looks amazing, and I'm sure the copper will oxidize in interesting ways.
The charger is a huge improvement over the cottontail chargers with the magnets on wires. One minor cavil is that is not easy to remove a battery from the charger after charging - it goes so deeply into the USB-end that there is no way to pull it back far enough to tilt it out head-first, and no good way to get a grip on the cell to pull it back out tail-first (the way it went in). I'm thinking that if the open cutout in the cylinder was a bit longer and wider, it would be a good deal easier to remove the charged cell.
Keep up the fantastic work, Guy!