Through a very, very, very reliable source.....one I will not name in this forum, I was told to stay away from the revolution engine due to all the problems they are having with this engine design! The engine originally started out as a Brison engine but there were several "quality" issues and the business associates of the " revolution" engine then decided to move it to canada to conclude the finish build on the engine and produce it there. Maybe you should call "Brison" and talk to the owner to find out more information. They may be able to "enlighten" you to the actual quality of the engine.[:-]