vansig,
Feel free to be open-minded. I worked with Paul March and Jim Woodward for 15 years. I have a degree in physics from Oxford. I don’t make assertions lightly.
I already gave you a simple recipe for a high school (UK: grammar school) algebraic derivation of my assertion that all propellantless propulsion schemes are inherently OU.
It is up to you to turn the crank.
As for dark matter – I believe you forgot to throw in the kitchen sink, too.
Andrew Palfreyman