Yes this kind of design is realy efficent and if compare what Sirio did-they just make sleeve with integrated couple fins. That design been use on control line team racing in airmodeling last 20 years ( but for some reason they call it innovation). In that design we still have part of the sleeve ( bottom) which is vibrating during the work and creating mettal debry. On our design we don't have anything hanging and vibrating, also temperature transfer rate is much higher all over the sleeve ( no double walls nowhere). I am not going to be surprized if very soon a lot of companies will start work on this kind of design, but they will be chasing the tail. On the moment when they will start work on it, I will learn all about it 100% and will have more advantages, even monsters like .... will chasing.