Hi Bill. I am very interested in your CC1 machine but I also have my heart set on a rotary pump machine, mainly because it is substantially much quieter. But I'd have to double my budget just to get my hands on a machine with type of pump. I love the CC1's feature (not to mention price) and am considering retrofitted one with a rotary pump, if possible. Have you thought making a rotary pump version? Maybe even offer a retrofit kit or service for CC1s? I'd gladly pay the extra ~$200 for it.
Like my last comment, I am making a RU-vid video on a simplified explanation of how an expresso machine works. I would like to request permission to add an image (or a clip) in my video, whichever you prefer. Please let me know if you would allow this. I can link or credit your video if you wish. Thanks!