I would go with the unfinished airframe as you have to install a new intake duct to mate up to the bypass. Its not hard to do but not having any equip in the airframe would make things easyer as you will have to remove everything to replace the duct. I went with the turbine inlet duct but did not use the bypass system as I was told the engine would run hot ( AMT 180). I also mounted the ail. servos
in the front of the wing roots and used a straight 5" turnbuckle instead of using flex conduit. This gave more room up front for electronics. I would also look into different fuel tanks. A turbine uses more fuel that a DF engine. As said above you are going to want to buy the turbine install kit from BVM as it has the carbon fiber pieces needed to upgrade the airframe. Theres a few pics in my gallery.