Im not sturing anything up but good greif the JJ Turbine wheel is not designed the same as the Wren.... Everyone says the JJ was copied for a Mk2 kit....3 weeks ago a goof friend of mine brought a Mk2 to the field and we sit them side be side and the was a clear difference in the pitch of the jj compared to the wren, although we did not count them, it seemed the jj had a few more blades aswell.