Michael Dambach created the 2nd inlay and allowed chips to be made on it. I designed that particular 1000 with slightly different colors to differentiate it from the original 1000 (of which I own 2), then created a 5000 I thought worked with it. Some of the t500 seemed prone to dirty stacks so I have about half of mine with secondary colors to try and fix that without being a total departure from the original.
Nice chips, as most on the hhr stack like bricks!