If the average grill is only $375 then you need to stay away from that $300 figure for your unit.
My best option at this stage is to target high end outdoor kitchen suppliers with grill units price over $2000.
to come up with a cheaper MPO, I need to commit to huge number of units.
Yeah, but I bet you could pick up another 100 degrees if it did, plus, from a manufacturing standpoint, the chimney is a significant cost of production, and I question if it is needed at all, a simple slot would serve the same purpose.
Current MPO will not fit every grill. With high end grills, closing the lid may not be an issue. I will start visiting some the local high end grills suppliers and see how MPO fits in these units. These grills will have high BTU, you will reach higher temperature without the need to close.
MPO chimney is removable, you can operate with or without it. I am looking for ways how to test the air flow and justify the need. It does add a significant cost to the unit. Another option is to offer the chimney as an accessory.
the point Tom made was correct though the depth of the MPO was about the same as Craig's grill so to pick up the MPO you had to scoot it away from the back of the grill to make room for the leaning back of the MPO. then, to close the MPO, it had to be moved back in, which wasn't an easy one hand move. We all thought that a hinge on the top of the back panel would make this easy.
I don't have a burner on the back of my grill, when I lift MPO with my left hand, MPO back comes in contact with the grill back, and MPO slide forward as I lift. To place back MPO, I do have to slide it back. I place the bottom stone couple inches from the back to allow for MPO to move back and forth. Which also allow for more heat to flow over from the back, to heat top stone and bake pizza top faster. You have to rotate the pizza couple of time to for even backing all around.
I am still waiting on my prototype to allow turning the stone through the front window. To keep the cost down, I planning to offer it as an accessory.
MPO is intended for one person operation, if it require two persons to operate, it will not be successful.
I need to create short video on how to operate, and have different people try to use MPO and see if that would help. This is a major hurdle.
Thanks again for every one feedback and inputs. Looking forward for Craig inputs.