I've looked twice at this mod and i have to say it's actually pretty good. But i've wondered if there is a bug with the new Interstellar Fuel Switch 2.0.6 and the new Kscale64? Because all the engines have less thrust and the "Merlin super full thrust engines" have less thrust then the "full thrust merlins". Also the Tanks have less storage of fuel.
Besides of this, this mod is pretty nice.