I think you might have easier time selling the pump kit than the machine and the grinder. For one, I am almost sold on trying the kit, but the description is missing necessary details - what's in the box, ideally with a photo, and which machines it can be used with (and which it cannot be).

Also, related - set up a mailing list and add a subscription link at the bottom of every page. I bet people that are interested but hesitant would love to get a ping when you add more info to the website.

Thank you for the explanation! I was totally confused about it. I thought the pump is at the other end of the tube.

In that case I agree that a video where one makes coffee with it would be useful. That would have disabused me of my confusion immediately.