The client wanted a set of coins based on the artwork in the 5e PHB. When I was prototyping my original currency I'd started with the 5e coins but soon found that I could get anything like the art on the coins to come out of the 3D printer (at least on a practical scale). I'd still based some of my original coin models on the classic currency so I had a good place to start. Fortunately the client was mostly interested in the shape and color of the coins, not their artwork. In the process I've found this style of coins was much faster to produce and a bit more economical too. I'm hoping to make some small tweaks here and there and start offering them as a permanent listing next year.