Take a look at the January from Artemis Design Studio. The January is a 60% O-Ring mounted keyboard kit. It comes with a sandblasted copper back weight and is available in three different aluminum options and two Polycarbonate options. Matching wrist rests are also available. Important: There is no PCB in the Kit included, since it follows the common H60 standard. For PCBs, Wrist Rests and Extras click here.