Bert, you seem like a great guy and I'm always appreciative when equipment developers seek out this forum's advice. I hate to be the bearer of bad tidings, but I really don't see this going anywhere.
The overall design is incredibly sexy, but, with all that stainless, there's no way you're clocking in with a retail below 2stone. I've made it clear, on many occasions, that the 2stone insert is a waste of money, and that, for someone with minimal DIY skills, it can be built for a fraction of the cost. The sexy look of the MPO, the adjustable stone height, the chimney and portability are all really nice, but I don't see these features being worth the minimum of $150 difference between this device and making something similar yourself.
And then you've got licensing concerns. I am by no means an expert in patent law, but, when a person invents something and patents it, doesn't another inventor who invents something similar have to prove the new item's uniqueness? There's no court in the land that would ever consider this a unique invention. This is a 2stone + additional features, and, since 2stone has applied for a patent, should you decide to manufacture this device, I don't see how you can avoid paying them a licensing fee (if they even grant you the rights). Am I missing some aspect of the law here?