OK, just had a look at the link above.http://www.bluemountainavionics.com/greg/aircraft.html
This seems to be the BIG trade off for those of us wanting to extract the highest posssible performance.Finally, while the turbine Cozy will make great holes in the sky, my main question would be regarding the usefullness of the installtion. The converted engine has an SFC at sea level of about 1.1, give or take a bit. So, for 850 pounds of thrust, it consumes 935 pounds of kerosene per hour at low altitude - this translates to just short of about 150 gal. per hour! Talk about a toilet bowl for a carburator!