Thanks for all the kind comments guys, and yes Tom the small measurements seem to mean so much at this level in the set up and final performance.

One of the common problems people have putting high horse power on the 6 bolt crank is the flywheels coming loose, it's the vibration and harmonics from a badly set up engine that does it, the wrong measurements in the above set up, or in the head volume matching that I will describe next can all contribute to a possible failure.