Hmmm.. why even post to a public forum then if you aren't looking for opinions? Why not move on over posts like mine if you're so confident in your solution?
I've seen a few of these convertible helmets break (switchblade and bell super). Including the older bell that my wife owned. They're a solution for someone pretending they need/want a full face, who are probably the people who would benefit from a real full face the most. Then when they land on their face it snaps off and they still break their teeth. Just my opinion of course... on a public forum designed to share opinions and ideas.
You're serious when you say "there's lots of positive reviews of this helmet" too? Paid reviews since it isn't even available yet you mean.